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40

Hens o n  9000  Per imeter   Us er   M a nua l

E l e k t r o n   E y e   T e c h n o l o g y   2 0 1 8

3 .2 .3

F ov ea m easu rem en t

In a ZATA test it is possible to measure the sensitivity of the eye at the fovea. For this
measurement the patient fixates the centre of a four-point pattern of lights positioned below
the normal central fixation light.  

The software uses a 4-2 staircase algorithm to obtain three measurements of the foveal
threshold, and then takes the average of these three readings to give the final estimate. The 3
measurements are intertwined to avoid any obvious sequences.

1.

Click 

 and then confirm in the pop up window.   

2.

Instruct the patient to look at the centre of the four lights, and to press the response
button when they see a light flash at the centre of the pattern. the operator should
emphasise that many of the presentations will not be seen. If the patient is not sure
they saw a stimulus presentation they should not press the response button.

3.

Click 

 to start testing.

 

Summary of Contents for Henson 9000

Page 1: ...Elektron Eye Technology Ltd Henson 9000 ...

Page 2: ...esponsibility for errors or omissions or for damages resulting from the use of information contained in this document or from the use of programs and source code that may accompany it In no event shall the publisher and the author be liable for any loss of profit or any other commercial damage caused or alleged to have been caused directly or indirectly by this document Printed May 2018 The HENSON...

Page 3: ...selectin g differen t mu ltiple stimu lu s pattern s 24 Missed stimu li in mu ltiple stimu lu s su prath resh old test 25 Sin gle Stimu lu s 26 Stan dard an d Mu lti samplin g Algorith ms 27 Patien t in stru ction s 28 Settin g th e test in ten sity 29 Sin gle Stimu lu s algorith m 30 Mu ltiple Stimu lu s algorith m 31 Test O ption s 32 Exten din g th e test 33 Addin g an d correctin g presen tati...

Page 4: ...ion s 69 Refractive correction 70 2 Auto timing 71 3 Catch trials 72 4 Changing eyes 73 5 Demonstrating the test 74 6 Entering patient data 75 7 Entering the patient s date of birth 76 8 Fixation targets 77 9 Help facility 78 10 Help Rx 79 11 Printing the results of a field test 80 12 Response button 81 13 Saving visual field data 82 14 Video camera Part V Options program 83 84 1 Tests 86 2 Comput...

Page 5: ... database 112 2 Creating a new visual field database 113 3 Copying a visual field database 114 4 Merging databases 115 5 Transferring records between databases 116 6 Import Henson 6000 records Part VIII Appendix 1 9000 technical specification 117 Part IX Appendix 2 9000 connection details 120 Part X Appendix 3 Installation 121 Part XI Appendix 4 Maintenance and warranty 127 128 1 Regular inspectio...

Page 6: ...t r o n E ye Te c h n o l o g y 144 6 Database errors 145 Test n ot recogn ised 146 Database B acku p n ot available Part XIII Appendix 6 License file 147 Part XIV Appendix 7 Networking 148 Part XV Appendix 8 Practice management integration 149 Index 153 ...

Page 7: ...ome E l e k t r o n E ye Te c h n o l o g y 2 0 1 8 1 Welcome Henson 9000 Perimeter To find out more about Henson perimeters visit our website http www elektron eye technology com or scan the QR code opposite ...

Page 8: ...arranties for Elektron Eye Technology UK Ltd products and services are set forth in the express warranty statements accompanying such products and services Nothing herein should be construed as constituting an additional warranty This symbol on the product or on its packaging indicates that to preserve the environment this product must be recycled after its useful life as required by law and must ...

Page 9: ... environments where handling of fluids is normal use This equipment should be kept dry at all times Backing up your data It is strongly recommended that you regularly back up the database of patient records on an external hard drive or other suitable removable media to avoid any possibility of data loss This simple procedure is described later in this manual in Database Backup Allergy advice The c...

Page 10: ...g Version 1 4 May 2015 Changes to patient instructions in the first person Additional formatting changes and corrections Version 1 5 November 2015 Added Progression information to coincide with Version 3 4 Software release Version 1 6 April 2017 Changes for Version 3 5 Software release addition of integration changes to Database images additional language support Version 1 7 May 2018 Changes for V...

Page 11: ...ractice management integration but it is important that you understand them if you do The previous versions of the software stored a PDF copy of the printout alongside the database in an images folder The image stored is now a JPEG picture file The database will operate in the same way as before except that the 2 eyes plots threshold tests are shown on different tabs The quality of the JPEG pictur...

Page 12: ... machine The information contained in this manual is subject to change without notice All rights reserved Reproduction translation or adaptation of this manual without prior written permission of Elektron Technology UK Ltd is prohibited except as allowed under copyright laws Elektron Technology UK Ltd shall not be liable for technical or editorial errors or omissions contained herein The following...

Page 13: ...ye Te c h n o l o g y 2 0 1 8 1 5 Acknowledgements Microsoft Windows Windows 7 and Windows 8 and Windows 10 are registered trademarks of Microsoft Corporation Adobe and Acrobat R reader R are registered trademarks of Adobe systems ...

Page 14: ...g y 2 0 1 8 2 Quick start To start a visual field test or one of the menu bar items click over that item on the start up screen To get more help on an item in the start up screen click that item on the image below See Appendix 3 for installing and setting up the software 121 ...

Page 15: ... 2 1 Smart Supra Single Stimulus test After selecting the test and entering the patient s date of birth you will be presented with the Smart Supra Single Stimulus test screen below To get m ore help on a test screen item click over the item in the im age below 75 ...

Page 16: ...y 2 0 1 8 2 2 Smart Supra Multiple Stimulus test After selecting the test and entering the patient s date of birth you will be presented with the Smart Supra Multiple Stimulus test screen below To get m ore help on a test screen item click over the item in the im age below 75 ...

Page 17: ... is a new or an existing patient Depending on your response you will then either need to enter patient details or select the specific patient s details from the database Once this has been done you will be presented with the ZATA Threshold test screen below To get m ore help on a test screen item click over the item in the im age below 57 57 ...

Page 18: ...n E ye Te c h n o l o g y 2 0 1 8 2 4 Esterman Binocular Driving test After selecting the relevant Group 1 or Group 2 test you will be presented with the test screen below To obtain more help on a test screen item click over the item in the image below ...

Page 19: ...py Adaptive Threshold Algorithm This strategy replaces the classic Full threshold algorithm It is much faster than the Full and Fast Threshold programs and will normally be the program of choice for monitoring visual field loss The ZATA program uses a Bayesian algorithm and adaptive terminating criteria to make the best use of prior data This is a fully automated test where the patient presses a r...

Page 20: ...000 software Single and Multiple stimulus Both incorporate three levels of testing Both can be run in an age related Total Deviation or threshold related Pattern Deviation mode The flow chart below gives the different stages of a Supra Threshold test See also Fixation targets Default threshold setting Establishing the test intensity Analysing the results 25 21 32 28 76 28 28 35 ...

Page 21: ...e patient where the stimuli they saw were Any missed stimuli are then marked as misses It is often useful when trying to establish which stimuli were missed to ask the patient to report the clock hour positions of the seen stimuli 4 If on the second presentation the patient reported the correct number then the perimetrist should proceed to the next pattern In this case it is assumed that the error...

Page 22: ...hreshold set by age The test is going to take about 2 minutes You must look at the central red light and keep your eye as still as possible The technician is going to present patterns of 2 3 or 4 light spots Not all of the spots will be the same intensity After each presentation he she will ask you how many you saw The technician may ask you where you saw the lights Add when setting the threshold ...

Page 23: ... or press the left or right arrow keys on the keyboard All the patterns within the current test level are represented by a line of buttons along the bottom of the screen To select a specific pattern click the pattern button Each pattern button shows the number of stimuli in the pattern The number on the button is initially green and turns black once the pattern has been presented If there is a mis...

Page 24: ...ss the pattern should be presented a second time If the incorrect number is given twice then establish which stimuli were missed by 1 Asking the patient where they saw stimuli It is often helpful at this stage to tell the patient to consider the bowl as a clock face and to give the hour positions of the stimuli 2 To mark a location as missed move the mouse to the missed location click the left but...

Page 25: ...omfortable The test intensity is derived either from the patient s age or from a measurement taken at the beginning of the test There are two different test algorithms Standard and Multi sampling The patient responds to each seen presentation by pressing the response button This test incorporates a number of false positive catch trails that help to discourage the patient from predicting the next p...

Page 26: ...he onset of a test by clicking Standard algorithm In this algorithm the patient has to miss a flash at each test location twice or see it once before it is marked as missed or seen Having to miss the stimulus twice before the location is marked as a miss reduces the number of false positives misses This algorithm has been part of the Henson software for many years Multi sampling algorithm In this ...

Page 27: ... all of the flashes of light are the same intensity Some presentations are deliberately blank so do not press the button unless you are sure you saw a light flash You must keep looking at the central red light and keep your eye as still as possible If you want to take a break you can hold down the response button The test will pause until the response button is released The first few presentations...

Page 28: ...threshold departs from the average value for their age e g when there are media opacities Threshold related Pattern Deviation The level is set by a series of measurements taken at the onset of the test The algorithm is different for Single and Multiple Stimulus tests When your machine was installed one of these techniques would have been set as the default method within the Options program You can...

Page 29: ... is undertaken The average intensity of the last four presentations at each of the four test locations is then taken as the threshold To guard against the inclusion of data from locations where the threshold is abnormally depressed the algorithm excludes data from locations where the average of the last four presentations is below the 95 confidence limits of the expected age setting If all test lo...

Page 30: ...tablished when the test will automatically jump to the Supra Threshold testing mode Notes The algorithm starts by presenting a pattern that should be easily seen At each subsequent presentation it reduces the intensity until the patient reports twice that none are seen If none were seen on the first presentation then the algorithm increases the test intensity It is important to tell the patient wh...

Page 31: ...h are set in your Options file For the Multiple and Single Stimulus tests you can select to test on the basis of the patients age or from a measurement taken at the beginning of the test For the Single Stimulus test only you can also select the Standard or Multi sampling test algorithm Once you have made your selection click Click to exit without changing the settings 62 28 26 ...

Page 32: ...ns The third level is a 24 2 and 10 2 test 86 locations The selected level is highlighted in blue and the level can be increased at any stage of the test The figure below shows the distribution of stimuli across each of the three levels Additional stimuli can be presented manually The perimetrist does not have to decide on how many stimuli to test at the onset of the examination They can start off...

Page 33: ... the location you wish to test 2 Click the left mouse button and the following pop up will appear 3 Click over the 1st icon to present a stimulus you can do this as many times as you like 4 If seen Click over the 2nd icon 5 If missed click over the 3rd icon 6 To remove a miss click over the 4th icon In the Single Stimulus test 1 Select Manual operation 2 Move the cursor to the location you wish to...

Page 34: ...ck to the location and re test it at the same intensity If it is missed a second time it will test it at the 98 level and if missed at this level than at the 99 level Multiple stimulus In the Multiple Stimulus test the program starts off testing at the 95 level If the patient reports fewer than the correct number of stimuli then the pattern should be repeated If they still report fewer than the co...

Page 35: ...timuli in the status bar at the bottom of the screen see below At the end of a 24 2 test a cumulative histogram is presented giving the number of location missed at each level At the end of a 24 2 plus 10 2 test an additional cumulative histogram is presented giving the number of 10 2 locations missed at each level see below ...

Page 36: ...e Te c h n o l o g y 2 0 1 8 3 1 9 Toolbar Exit the program and return to main menu Save current visual field data both eyes Print results both eyes Start new Patient same test Open the Help file context sensitive Open Help on the correct Rx to use 81 79 77 ...

Page 37: ...rd ZATA Fast differs from ZATA Standard in that it has looser terminating criteria The terminating criteria dictate how accurate the threshold estimate must be before the program stops testing each location Looser terminating criteria mean that the ZATA Fast test will be quicker than ZATA Standard although the accuracy of each threshold estimate will be reduced by a small amount ZATA Fast is appro...

Page 38: ...d at the blind spot and if the patient sees this stimulus presses the Response button it is assumed that they were not fixating accurately The number of blind spot tests and the number of times the stimulus was seen in the blind spot are displayed as fixation losses on the status bar see below and printout In a reliable patient fixation losses should not exceed 20 Occasionally the perimeter may fa...

Page 39: ...0 1 8 3 2 2 Extending the 24 2 test The ZATA 24 30 test starts off testing the 24 2 locations The test can be extended either during or at the end of the 24 2 test to include the 30 2 locations by clicking the 30 2 button The current level is highlighted in blue 56 ...

Page 40: ...e measurements of the foveal threshold and then takes the average of these three readings to give the final estimate The 3 measurements are intertwined to avoid any obvious sequences 1 Click and then confirm in the pop up window 2 Instruct the patient to look at the centre of the four lights and to press the response button when they see a light flash at the centre of the pattern the operator shou...

Page 41: ... y 2 0 1 8 3 2 4 Global Indices Global indices are single numbers that characterize the whole visual field They are used to monitor the extent of loss over time There are three provided with the ZATA Threshold test Mean Defect Standard Deviation Hemifield Test ...

Page 42: ...e a cataract The Mean Defect score is based on the average of all the defect values excluding those from the blind spot area However as some test locations are more variable than others it is weighted to give more importance to the less variable locations those nearer the centre of the tested field A P value is given when the probability of the MD value coming from a normal patient is below 10 pos...

Page 43: ... indicate a deepening or enlargement of localised loss The index is insensitive to overall shifts in sensitivity that may occur due to cataract etc The index is sensitive to lens rim artefacts and droopy lids A P value is given when the probability of the SD value coming from a normal patient is below 10 possible outputs are 10 5 2 1 0 5 When it is above 10 then the message Within Norm al Lim its ...

Page 44: ...hin normal limits The test is very sensitive to the early changes that occur in glaucoma which are often restricted to either the superior or inferior hemifields The output from this analysis is either Within Normal Limits Borderline or Outside Normal Limits In cases where the result is Borderline or Outside Normal Limits it also gives a p value 10 5 2 1 0 5 Th e figu re above sh ow s th e global ...

Page 45: ...ts At the end of a ZATA test the following three buttons will appear on the menu bar The currently displayed format is represented by the button with a blue background displays the results in a gray scale format displays the threshold values dB displays the defect values dB 46 46 47 ...

Page 46: ...ay scale Threshold and gray scale values are displayed on the standard printout Threshold values are given in decibels of attenuation where 0 corresponds to 3183 cd m2 10000 asb The above figure shows the Threshold left and gray scale right values from a 24 2 field test as seen in the standard printout 50 ...

Page 47: ...ye The probability values take into account the variability in threshold estimates at each test location Positive values indicate a higher than average sensitivity Th e above figu re sh ow s th e Total Deviation left an d Pattern Deviation righ t valu es as seen in th e stan dard prin tou t Absolu te valu es at th e top an d probability symbols below Example If the measured threshold was 25dB in a...

Page 48: ...opacities then the Pattern Deviation values will be lower than the Total Deviation values The offset is calculated from an analysis of the most sensitive regions of the visual field and has a maximum amplitude of 6dB in either direction When there is a particularly large amount of visual field loss the Pattern Deviation calculations become inaccurate and are not displayed The Pattern Deviation val...

Page 49: ...49 Visual field tests E l e k t r o n E ye Te c h n o l o g y 2 0 1 8 ...

Page 50: ... 1 8 3 2 6 Printout Below is an example printout from the ZATA Threshold test Patient demographics and details of the field test used are given at the top of the chart You can get further help on the different elements of the print out by clicking over that item in the image below ...

Page 51: ... 0 36dB year As the rate is higher than the confidence limits the progression is significant at the 95 limit The three vertical lines on each plot represent the time points that correspond to the three gray scale images shown above each graph When first entering the analysis these will be the last three visits You can move to different visits by clicking the left right arrows to either side of the...

Page 52: ...52 Henson 9000 Perimeter User Manual E l e k t r o n E ye Te c h n o l o g y 2 0 1 8 Clicking any other record will revert the right hand display to a visual field chart ...

Page 53: ...five is advanced loss Using both Mean Defect and Pattern Standard Deviation is better than using either index in isolation Pattern Standard Deviation is more sensitive than Mean Defect to early localised loss while Mean Defect is more sensitive when defects become advanced The progression software plots each visual field result as a point on a GSS II chart and connects the points together with a l...

Page 54: ...el will contain the progression analysis see below 3 Click The image shows a maximum of six gray scales When there are more than six data points the gray scales from the first two and last three will be displayed Any changes made while in the progression analysis e g excluding an outlier will be duplicated in the image which will display either the line plot or GSS II plot depending on which was a...

Page 55: ...omfortably The test is going to take about 4 minutes Press the response button when a light flash is seen Some presentations are deliberately blank Do not guess You must ONLY press when you are sure You must keep looking at the central red light and keep your eye as still as possible If you want to take a break hold down the response button The test will pause until you release The first few prese...

Page 56: ...resents stimuli on a 6 degree square matrix displaced 3 degrees from the vertical and horizontal mid lines and covers an area of either 30 or 24 degrees the 30 2 is an extension of the 24 2 test that can be selected during or at the end of a 24 2 test The 10 2 pattern presents stimuli on a 3 degree square matrix within the central 10 degrees Stimu lu s location s Left 30 2 24 2 exclu din g red loc...

Page 57: ...table to find the patient or use the Search function 2 Highlight the required record usually the last record for the patient and then click 3 The patient s name record number date of birth etc will be loaded and if the selected test is the same threshold test the threshold data will be loaded ready to start testing from prior values If you select a new patient the following data entry form will ap...

Page 58: ...58 Henson 9000 Perimeter User Manual E l e k t r o n E ye Te c h n o l o g y 2 0 1 8 Notes Using prior data reduces test times and increases the precision of the threshold estimates ...

Page 59: ...results both eyes Open the help file context sensitive Start this eye again Any data already collected will be lost unless saved Tested eye has blue background Changing eyes can be done at any time without losing data Blind Spot re locate Extend test Test fovea Fixation targets Display format This symbol will appear on the menu bar when the patient response button is depressed 81 50 77 38 39 40 76...

Page 60: ...d intensity stimulus 10dB 318 4cd m2 with the Goldmann equivalent background intensity of 10cd m2 When performing a Driving test the patient s forehead should be placed in the middle of the head rest and they should be allowed to turn their head to follow the fixation point The Driving tests are single stimulus tests and the patient responds to each seen presentation by pressing a response button ...

Page 61: ...tions are deliberately blank and you will not see a flash If you repeatedly press the response button when there is no flash you will fail the test Keep looking at the central red light On occasions the red light will move to a new position you must follow it with your eyes and if necessary turn your head You must keep your eyes as still as possible If you want to take a break hold down the respon...

Page 62: ... maintain a minimum value for the beep volume Min volume On The UK DVLA require that a beep is made when a stimulus is presented so this option should be selected when testing patients within the UK For use in countries where there is no such requirement leave the check box empty This will allow the beep to be turned off completely using the slider 62 ...

Page 63: ...eld tests E l e k t r o n E ye Te c h n o l o g y 2 0 1 8 3 3 3 Stimulus locations The patterns of the stimuli in the Group 1 and Group 2 Driving Tests are shown below Group 1 120 point test Group 2 124 point test ...

Page 64: ...apid response times to operator commands Rapid access to database records Click and touch screen operation Single click operation for common operations e g when you have finished a Smart Supra test just click to start a new test Windows operating system Henson perimeters use the Windows operating system Most users will already be familiar with many of the screen layouts and operations Printing can...

Page 65: ... sensitive help facility Advanced analysis routines The ZATA Threshold test includes Total Defect Pattern Standard Defect and Probability maps that match those of the Humphrey Perimeter It also includes the global indices Mean Defect and Pattern Standard Deviation that again match those of the Humphrey Perimeter It includes a Hemi field analysis for the early detection of glaucomatous loss with pr...

Page 66: ...efore undertaking a visual field test the patient needs to be carefully instructed on what the test is about and how they need to respond They need to be carefully positioned at the instrument have the correct refractive correction in front of the eye under test and an occluder in front of the other eye 68 67 69 ...

Page 67: ... test eye should be looking through the centre of any trial lens which should be positioned as close as possible to the eye The chin rest should be raised to support their chin using the on screen up down buttons see below Do not try to lift a patient s head with the chin rest as this can cause excessive loading of the mechanism NOTE The chin rest buttons are disabled when the test is running ...

Page 68: ... Instructions It is important that the patient fully understands what they need to do during the test Suggested instructions for the different tests can be found by following the links below a Smart Supra Multiple Stimulus b Smart Supra Single Stimulus c ZATA d Esterman Binocular Driving 22 27 55 61 ...

Page 69: ...ent correctly aligned move the holder as close to the patients eye as possible Earlier Henson 9000s were designed to be used with a special perimetric lens set and head mounted frame The integral lens holder is intended to be an improvement on this solution Note This holder is available to retro fit should you require one for your instrument An occluder is placed in front of the eye not being test...

Page 70: ...sts the speed of presentations changes according to how fast the patient presses the response button If the patient responds quickly the speed of presentations increases If they respond slowly the speed of presentations will decrease The perimetrist can adjust the speed by clicking the arrows at either end of the scale 80 ...

Page 71: ...he test screen The faction numerator is the number of errors and the denominator the number of catch trials For example 3 10 false positives would indicate that the test had made 10 false positive trials and the patient had in error responded to 3 of them Normally the number of false positives should be less than 15 and the number of false negatives less than 30 False negatives increase if there i...

Page 72: ...cking the unselected button Swapping during a test will not result in any loss of data Being able to swap is particularly useful when screening the visual field If the first eye was OK and the second eye showed a defect then it is possible to go back to the first eye and test some more locations now that the suspicion of a defect has been raised by the result from the second eye ...

Page 73: ... with a demonstration This consists of series of presentations where the responses of the patient are not saved During the demonstration stage the test status indicator will show It is a good idea to tell the patient not to be concerned if they make some errors at the beginning of the test as the first few presentations do not count ...

Page 74: ...aving your data in the database and depending on your set up options prior to printing the results the following form will ask you to enter patient details Use either the on screen keyboard or an external keyboard to enter edit the data in the fields Only use the following characters letters A Z numbers 0 9 and hyphen 87 ...

Page 75: ... g y 2 0 1 8 4 7 Entering the patient s date of birth To enter the patient s date of birth at the beginning of each test Click over the correct day month and year using the vertical sliders when necessary and then click to continue Clicking will exit the test ...

Page 76: ...ral red spot Four peripheral spots located 6 degrees from the central point along the 0 90 180 and 270 meridians The four peripheral spots are provided for patients who have lost central vision The patient should be instructed to look at the centre of the four point pattern The selected target is highlighted in blue and can be changed at any stage of the test ...

Page 77: ...ne help Opening and closing the Help facility will not affect the test programs You can keep the help program open while continuing with a field test An example of a help page is shown below On many pages clicking over an item within an image will jump to a new help page where additional information will be available ...

Page 78: ...o n E ye Te c h n o l o g y 2 0 1 8 4 10 Help Rx Recommended additions lens power to be added to the patient s current distance prescription are given in the table below Patient s age Add 40 44 1 50 45 49 2 00 50 54 2 50 55 59 3 00 60 64 3 50 65 4 00 ...

Page 79: ...een keyboard or an external keyboard to enter edit the data in the fields Only use the following characters letters A Z numbers 0 9 and hyphen Click to print the menu bar icon will change when called for printing to return without printing Notes 1 You should test both eyes before printing unless you are only testing one eye or printing the results of an Esterman Binocular Driving test 2 The print ...

Page 80: ...The Patient Response Button is used in the single stimulus tests The patient needs to click the response button each time they see a stimulus The test is paused if the button is held down This is useful if the patient needs to temporarily stop the test will appear on the tool bar when the button is pressed ...

Page 81: ... to return without saving Notes Both eyes are saved in a single database record You should therefore test both eyes before clicking save unless you are intending to test only one eye or are saving the Esterman Binocular Driving test The date of test time of test date of birth and type of test are automatically entered The date and time of test come from the PCs internal clock which needs to be cor...

Page 82: ...n o l o g y 2 0 1 8 4 14 Video camera The Henson 9000 is fitted with a video camera for monitoring fixation The camera is set up within the Options program The intensity and contrast can be adjusted during a test by clicking over the appropriate buttons see above 89 ...

Page 83: ...Start up screen and then run the Options program from the Windows desktop icon The tabbed form below will then pop up On each tab there are a series of controls On the first tab shown below you can enter the name and address of your practice This will appear on the printed field charts Once you have made changes click Changes on all tabs will be saved To get help on other tabs click over that tab ...

Page 84: ...s You can select whether Smart Supra the threshold is set by age Total Deviation or by measurement Pattern Deviation the program starts off with the 26 point screening tests or the 54 point 24 2 test the program auto extends from 26 point screening to 54 point 24 2 the Smart Supra single stimulus test uses the Standard or Multi sampling algorithm Driving test the beep has a minimum volume required...

Page 85: ...85 Options program E l e k t r o n E ye Te c h n o l o g y 2 0 1 8 ...

Page 86: ...rimeter s USB device the software language and whether to run in software only mode In software only mode messages are not sent to the perimeter This facility is available for those who wish to access the database on a separate computer Additional language files may be available to download check the website www elektron eye technology com support for more details ...

Page 87: ...rive directory and database boxes at the bottom of the screen The Drive will normally be the internal C drive The selected path and file name will be displayed in the Current Database box If you wish to reset to the default database C Henson9000 data fld8 db press the Reset Default button The quality of the stored JPEG image can be set to a value between 75 and 300 The higher the number the better...

Page 88: ...e The location is selected with the drive and folder boxes at the bottom of the screen There is an option to include a copy of the image file s with the backup This is normally the default option but if you are short of memory space on the backup drive you can un tick the box The images can be re created when needed NOTE From Version 3 5 the backup system now uses a rolling 10 copy backup The back...

Page 89: ... Select the correct video device from the Video Input Device drop down menu With a patient correctly positioned and looking through any trial lens use the buttons to adjust the image zoom the up down left right buttons to position the image in the video window Adjust the Brightness and Contrast sliders to optimize the image these can also be adjusted when running a test program 66 ...

Page 90: ...ogrammable buttons these need to be set up at instillation There are no selectable options 2 Text files The Henson 9000 will automatically use data placed into a text file by a practice management software if present The Henson9000 needs to be told where the text file is located Use the Drive and Directory lists to select the location and enter the file name into the file name box remembering it m...

Page 91: ...of the chart The PDF tab of the Options program allows you to archive an additional copy of the printout in a PDF format This facility is provided for practice management system that require a PDF format Use the drive and folder boxes at the bottom of the screen to browse to the required path File names are based on the patient details 105 ...

Page 92: ...E ye Te c h n o l o g y 2 0 1 8 5 8 Save Cancel In the Options program each tab has a Save Cancel and Help button Click on any of the tabbed pages to save the changes made on all tabs Click to return without saving any changes Click to obtain on line help ...

Page 93: ...line if your computer has an internet connection then you can register it directly Offline if your computer does not have an internet connection then registration can be done using a smart phone that has a data plan In both cases a licence number will be required this is either supplied with your Henson 9000 device check the rear of the unit for a licence number label or was purchased as part of a...

Page 94: ... you to enter in the boxes below the QR code Once entered press the Activate button and the software will check the response and activate the software if the number is correct If there is any error in the process then the reason will be displayed To Release the licence for example to use it on another computer just navigate to this tab and press the release button in either the online or offline t...

Page 95: ... a powerful Windows database To view this data exit any test programs and from the start up screen click on the menu bar The location of the database is set within the Options file To get m ore help on a Database item click over that item on the im age Note To print records you will need to have a PDF viewer installed on the computer 14 62 ...

Page 96: ...backup will ensure that you do not lose your data in the unlikely event of a drive failure The backup uses a rolling 10 copy system Each successive backup is appended with an increasing number from 1 to 10 before it goes back and overwrites backup 1 Important You should periodically make an additional copy of the database and store it in a safe location away from the Computer attached to the Henso...

Page 97: ...om a specific study or a group of patients On start up the database program displays data stored in the table defined in the Options program To view data stored in a different database 1 Click to see the Window below 2 Select the drive folder and database name then click Note When you next collect and save data the program will revert to the default database specified in the Options program 62 83 ...

Page 98: ...ing a record from the database To delete a record from a database 1 Select the record to be deleted 2 Click 3 When prompted confirm delete The database will be updated along with the backup Once deleted a record can only be retrieved by recovering it from the previously numbered backup file 104 ...

Page 99: ... display the screen below Use either the on screen keyboard or an external keyboard to enter edit the data in the fields Only use the following characters letters A Z numbers 0 9 and hyphen Click to save your changes to return without saving Note To correct the stored image file after modifying a record you will need to click ...

Page 100: ...o l o g y 2 0 1 8 6 5 Visual field chart The stored image of the visual field chart for the selected record is shown in the right hand panel To obtain a magnified image of a section move your mouse to the section and hold down the left button Normal view Zoomed view 101 ...

Page 101: ...atabase the list is sorted alphabetically by family surname To sort the database by record number or date of test click on the appropriate column heading You can also search for a specific family name or record number by entering details into the respective search box on the toolbar the search facility will move to the nearest match ...

Page 102: ...View lists all records while Tree View lists all patients grouped by surname Clicking on a surname in Tree View will display the first names of all the patients with the same surname and clicking on a first name will display all records for the selected patient The default view can be set in the options program and the view can be changed by clicking the List View or Tree View tabs 87 ...

Page 103: ...Import Records button triggers the second stage Select the Excel file where your HFA data has been stored and then click The 2 stage process allows 1 Editing of the HFA data It is not uncommon to find typing errors in records These can easily be checked and corrected within Excel before entering the data into the Henson database 2 It allows users to analyse the visual field data e g number of test...

Page 104: ...ghted and has an in the left column see below You can move through the database list by Pressing the up down arrow or Page keys Dragging the vertical slider up or down Using the Search facility Note The order of records is initially sorted by family name FamName You can sort by record number RecNum or test date DoT by clicking on the appropriate column header 101 ...

Page 105: ... are stored is a sub directory of your database directory and its name will be your database name plus images In the example below you can see the Henson9000 directory with a sub directory Data where the database files are normally placed You can also see 2 further sub directories FLD8images and More images These sub directories contain the image files In this case there are two sub directories be...

Page 106: ...ss on the toolbar d The currently displayed image will be opened in a PDF viewer e Follow on screen prompts to print Note To print records you will need to have a PDF viewer installed on the computer Note Previous versions of the software relied on Adobe reader to integrate with the database and display the stored PDF image files From Version 3 5 the Henson 9000 default image file format is JPEG I...

Page 107: ...numbers 0 9 and hyphen Family Name First Name and Record number are required fields i e values must be entered before you can save your data The other fields are optional The database contains raw visual field data patient details and an image of the printout This image can be used by practice management systems If the backup drive location is available then a backup of the database will be made A...

Page 108: ...progression analysis software that plots changes to the global indices Mean Defect and Pattern Standard Deviation To undertake a change analysis 1 Select a patient record The progression analysis will be conducted on this and all subsequent records 2 Click to bring up the progression page Note The progression analysis is only for ZATA data 104 51 ...

Page 109: ...hile stage five is advanced loss Using both Mean Defect and Pattern Standard Deviation is better than using either index in isolation Pattern Standard Deviation is more sensitive than Mean Defect to early localised loss while Mean Defect is more sensitive when defects become advanced The progression software plots each visual field result as a point on a GSS II chart and connects the points togeth...

Page 110: ...gram The Utilities program contains a number of routines to help with the management of your visual field database It starts by displaying a list of the records in the current database specified in the Options file To get m ore help on a utilities screen item click over that item on the im age below 87 ...

Page 111: ...t database 1 Click on the Utilities toolbar 2 Select the drive directory and database from the drop down menus 3 Click Once a database is opened you will be able to perform all the other utility routines e g copy merge edit When you exit the Utilities program the Henson software will revert back to the database defined within your Options file 87 ...

Page 112: ...e name for your new database it must end with db in the text box top right of the form 4 Click Once created it can be set to be your default database within the Options program If you want to create a new folder click then enter the name of the folder in the displayed box and click When the database is created a folder will be created to hold the visual field chart images When you exit the Utiliti...

Page 113: ... directory from the drop down menus 3 Click 4 When the copy has been completed store the removable drive in a safe place Ideally this should be at a remote location so that if there is an event such as a fire that damages your perimeter you will still have a copy of your data Notes The database name will remain the same as the original This function copies all the database files along with the sub...

Page 114: ...this operation may take a few moments The merge function copies all of the records into the default database and will recreate the image files The current database would normally be the default database i e the one defined within the options program Alternative databases can be used by first opening them before the merge The merge facility can be used to restore from a backup file or if you have m...

Page 115: ...bar 3 Select the Source drive directory and database from the drop down menus 4 Click 5 Both sets of database records are now listed Target on the left Source on the right see below 6 In the Source panel double click each record you want to transfer into the Target database on the right The Source database contains the records you want to transfer and the Target is the database into which you are ...

Page 116: ...anual E l e k t r o n E ye Te c h n o l o g y 2 0 1 8 7 6 Import Henson 6000 records To import data from a Henson 5 or 6000 database 1 Click 2 Select the location of the 6000 database from the drop menus 3 Click to initiate the import ...

Page 117: ...ular subtense of 0 5 degrees Goldmann III Luminance 0 05 3184 CD m2 0 16 10000 asb Presentation time 200ms Background is controlled with broad spectral LED s with output ranging from 400 740nm 3dB down Background luminance is 10cd m2 31 5 asb 3 FIXATION MONITOR Heijl Krakau technique in ZATA program On screen image of eye presented via CCD camera located below the central fixation LED 4 FIXATION T...

Page 118: ...on against ingress of water 11 ENVIRONMENT Temperature Operating 5 to 35 C 41 to 95 F Storage 20 to 50 C 4 to 122 F Relative humidity 10 to 90 non condensing Maximum vibration Operating 0 9 gm using a random vibration spectrum that simulates shipment by air Storage 1 3 gms using a random vibration spectrum that simulates shipment by truck Maximum shock Operating 1 52 m sec 60 inches sec less than ...

Page 119: ...ains lead for Henson Country specific Installation software on a USB flash drive Occluder eye patch Dust Cover Dual USB cable 14 OPTIONAL EXTRAS Electric Table Perimeter Trial Lens set 15 LIST OF SPARE PARTS Mains Fuses T2AH250V Occluder Patient Response Button Dust Cover Replacement head and chin rest pad set Twin USB Cable Mains cable country specific ...

Page 120: ...he rear panel The USB B type connectors are on the right hand side The patient response button is plugged into the jack socket in the middle of the rear panel It has been discovered that some computers do not have powerful USB ports and combined with the 2M USB cable do not power the camera properly resulting in a blank picture when testing In these cases the use of a mains POWERED USB hub is advi...

Page 121: ...le must be used but grounding reliability can only be achieved when the equipment is connected to an equivalent receptacle marked Hospital Only or Hospital Grade Outside of the hospital environment the Hospital grade mains cable must be used and connected to a grounded Earthed outlet to maintain grounding of the equipment 3 INTERCONNECTING Connect the supplied mains lead from the mains input conne...

Page 122: ...t and systems a Table 1 modified as appropriate using Fig 1 and 2 b Table 2 completed as appropriate using Figure 3 5 2 2 2 ME Equipment not specified for use in shielded location Tables 3 and 5 life supporting using Figure 4 Tables 4 and 6 non life supporting using Figure 5 selected and completed as appropriate following a e ...

Page 123: ...123 Appendix 3 Installation E l e k t r o n E ye Te c h n o l o g y 2 0 1 8 ...

Page 124: ...124 Henson 9000 Perimeter User Manual E l e k t r o n E ye Te c h n o l o g y 2 0 1 8 ...

Page 125: ...024 recommended Operating System Windows Professional Version 7 onwards Network Wired or Wireless network adapter if networking is required Connectivity TWO Free USB ports or a suitable powered USB hub to connect to the Henson 9000 9 Installing the software Ensure all other USB devices are unplugged from the computer Insert the supplied USB flash drive into the computer and wait for the prompt Sel...

Page 126: ...k the Video selection drop down box and choose the USB 2 0 Web cam Check that the message Default settings downloaded from Henson is displayed This is the set up information for the internal camera Click Save Open the Henson software by double clicking the desktop icon To automatically run the Henson software when the computer is started add this shortcut to the windows START UP folder A menu scre...

Page 127: ...oving it from the wall socket before any inspection maintenance or cleaning is undertaken If the unit is supplied with power from an electric table stand then the mains cable to the table stand should be isolated from the wall socket instead Regular Inspection Changing the fuses replacing the head and chin rest pads Cleaning Preventative Maintenance Replacement Parts Repairs and Re calibration War...

Page 128: ...n inspected by a competent person Particular attention should be paid to the mains cable at the back of the instrument and the cable of the patient response button To change the Fuses The fuses are housed in a small drawer located in the mains connector which is located on the rear panel of the Henson 1 To change the fuses remove the mains lead from the wall socket and then from the socket on the ...

Page 129: ...op type fastener and can be replaced without any tools To change the headrest pad 1 Prise up one end of the headrest pad 2 Peel it off to reveal the attached fastening strip 3 Align the headrest pad with the moulding indentation and lay it flat 4 Starting from the centre press the pad into place and work across pressing constantly The head rest will snap into place 1 2 ...

Page 130: ...est is in it s lowest position before changing the pad 1 With fingers prise up one end of the pad and 2 Pull if upwards to reveal the chin rest top fastening strip 3 Align the new pad with the rear edge and one end of the chin rest top 4 Starting in the middle press firmly down towards the edges and listen for the fastener to snap into place ...

Page 131: ...131 Appendix 4 Maintenance and warranty E l e k t r o n E ye Te c h n o l o g y 2 0 1 8 ...

Page 132: ...he software Upgrades of the software and documentation are available to download from the support section of the Elektron healthcare web site www elektron eye technology com If the software is upgraded up to date operational instructions can be found in the online help which can be accessed by clicking ...

Page 133: ...clear with a clean supply of air An aerosol can air duster designed for this purpose is preferable to blowing by mouth A soft lens brush can also be used to remove deposits Headrest Pad The headrest pad should be wiped between patients with a suitable sterilizing wipe Chin rest Pad The chin rest pad should be wiped with a suitable sterilizing wipe The chin rest and headrest pads are available as r...

Page 134: ... the insulation or plugs The connected computer should be maintained in accordance with the manufacturer s instructions This includes hardware and software maintenance The Computer operating system should be kept up to date with any patches and software upgrades The Henson Software should be kept up to date with any patches and upgrades Upgrades will be made available from the manufacturer and sal...

Page 135: ...the supplier Item Part number Dust cover PA0112 DP 030 T1 6AH250V HBC fuse TNFUS1217 T2AH250V HBC fuse TNFUS1218 Mains cable country specific Quote country for part number Patient Response Button PRB001 Occluder TNSUN1294 USB Lead Twin lead PA0112 DP 057 Headrest pad PA0112 DP 003 Chin rest pad PA0112 DP 005 The software part number will change with later versions of software Contact the supplier ...

Page 136: ...ble on request and at its discretion circuit diagrams component part lists descriptions calibration instructions or other information that will assist Service Personnel to repair those parts of the that are designated by the Manufacturer as repairable by Service Personnel Calibration It is recommended that the unit has a calibration check once a year to ensure it is within acceptable limits Please...

Page 137: ...ke good the defect at our own expense provided notice is given to us as soon as it is discovered and that the instrument is immediately forwarded to our works carriage paid in the original packaging and with security seals unbroken If the original packaging is not available then please contact the service representative to request packaging Please note that Elektron Technology reserves the right t...

Page 138: ... the desktop Re install the software On screen error messages There are several error messages that you may see when operating your Henson Many of these are just warnings that are self explanatory e g You have only tested one eye when you select print or save More information on these can be obtained by simply clicking the Help button attached to the message Other messages inform you that the hard...

Page 139: ... cannot be maintained at the beginning of an examination an error message will be displayed The most likely cause for this error is the room illumination being too bright If this is the case turn down the room illumination and press the Restart button The error may also be caused by a failure of one of the bowl illumination LEDs Clicking continue will proceed with the test Data collected will not ...

Page 140: ...2 0 1 8 12 2 Bowl error A Bowl error message will appear when the communications with the bowl do not appear to be working Check that the USB cables s between the Henson and computer are plugged in and that the Henson is powered up If problem continues contact a service engineer ...

Page 141: ...ED error At the beginning of each examination LED operation is checked automatically If a fault is detected an error message will be displayed Press Continue to proceed with the test but note that data collected may be subject to error If the problem continues contact a service engineer ...

Page 142: ...licate mouse buttons correctly some touch screens invoke a right mouse click if the touch screen is pressed for several seconds Try using a left click from a physical mouse instead of the touch screen If this works then the touch screen settings need changing If the chin rest does not stop when releasing the on screen button when using a touch screen check the settings of the touch screen to ensur...

Page 143: ... t r o n E ye Te c h n o l o g y 2 0 1 8 12 5 Key violation A key violation message will appear when trying to save a record in the database using the same family name record number and date and time of test of a record that already exists ...

Page 144: ...d visual field records It has a specific set of error messages related to the workings and limitations placed upon its operation In most cases the error message will have an associated help facility that can be accessed by clicking Further detail on some of these messages is given through the following links Test not recognized Database warning 145 146 ...

Page 145: ...abase is to import records from earlier Henson perimeters 6000 and Pro During the import process the Database will check that the data comes from a test that is supported by the Database software In cases where the test is not supported e g a peripheral test from a Humphrey perimeter you will get a message stating that the test type is not recognized 103 ...

Page 146: ... removable drive e g pen drive or a network address If the Database Backup location is not available e g the USB drive has been removed then you will get this warning message Continuing will save the data in the database but no backup will be made at this time When you re establish the backup e g re insert the USB drive and save edit another record a full backup will be taken Note If images are be...

Page 147: ...on the Start up screen opens up a window that shows the version number of the current software In addition it gives a link to the web site of Elektron Technology the manufacturers of the Henson range of perimeters and a second link to a file that gives details of the software License Click OK to close this window ...

Page 148: ...access the same database Multiple machines to access a network printer Server backup the database must reside on the server The options for networking the Henson will depend on what computer equipment is used Most Computers will have a network connector and many laptops will also include a wireless adapter Refer to the computer s manual for details of networking options ...

Page 149: ...ad the text file and use the details to set up the test In both cases the PMS software will have to be set up to generate the information required and pass this to the Henson software Passing Parameters Each of the Henson test strategies is a separate program and can be run individually After the file name there are a number of items called parameters that should be passed The following list gives...

Page 150: ...sed if set Your practice management software manual supplier can tell you how to program the buttons to send these parameters Text files If your practice management software does not support passing parameters you may be able to use text files to transfer the parameters The Henson software is operated normally from the Henson main menu but instead of entering details the patient details are read i...

Page 151: ...on tab shows you the date format required read in from the computer s regional settings and has a path and file name box To set the path browse to it using the drive and directory boxes at the bottom of the screen To set the file name click in the file name box and an on screen touch keyboard will appear You can use this or a regular keyboard to type in the name of the file making sure it ends in ...

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Page 153: ...cord 98 editing records 99 find record 101 introduction 95 Key violation 143 navigating 104 PDF file location 105 print record 106 save records as PDF 107 searching 101 transferring records 115 Database backup 113 Date of birth 75 Default database path 87 Default test level overriding 28 Default threshold 84 Defect 48 Delete database record 98 Demo mode 15 16 Demonstrate test 73 Display format 36 ...

Page 154: ...uick start 14 R Recor transferring to another database 115 Record printing 106 save as PDF 107 Refractive correction 69 Relocate blind spot 38 Repeat eye test 59 Response button 36 59 80 Response time 70 Retest 24 33 Rmv button 24 33 S Save database records 107 Save visual field data 36 59 81 Search database records 101 Set threshold methods 28 Single stimulus test 15 19 contents 25 Stimulus misse...

Page 155: ...Te c h n o l o g y Utilities copy to USB 113 create new database 112 introduction 110 merge databases 114 open existing database 111 transfer records 115 V Video camera 82 Video settings 59 82 89 Z ZATA 19 37 new existing patient details 57 ...

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