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Visual field tests

3 .1 .2

Sin g le s t imu lu s

The Single Stimulus Supra-threshold test is ideal for screening the visual field.

The test is fully automated and requires no intervention other than to

instruct

the patient on w hat to do, ensure that they have the correct

refractive

correction

in front of their eye and that they are correctly

positioned

and

comfortable.

The initial test intensity is set to 5dB above the patient's threshold. The

threshold

is derived either from the patient's age or from a measurement

taken at the beginning of the test.

Stimuli that are not seen by the patient are presented a second time at
the same intensity.

If missed on both occasions, the stimulus is marked as a miss and
presented at 8dB above the threshold estimate.

If missed at 8dB it w ill be presented at 12dB above the estimate. A gray
scale indicates the depth of defect (5, 8 or 12dB).

The patient responds to each seen presentation by pressing their

response

button

This test incorporates a number of

false positive catch trails

. These help to

discourage the patient from predicting the next presentation.

The test can be customised the w ith the

addition

of extra stimulus locations.

To g e t mo re h e lp o n a te s t s cre e n ite m click o ve r th e ite m in th e ima g e b e lo w .

Summary of Contents for HENSON 8000

Page 1: ... 2017 Elektron Technology Henson Perimeter User Manual ...

Page 2: ... author make no claim to these trademarks While every precaution has been taken in the preparation of this document the publisher and the author assume no responsibility 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...

Page 3: ...ing and selecting different multiple stimulus patterns 28 Missed stimuli in multiple stimulus suprathreshold test 29 Single stimulus 30 Patient instructions 31 Setting the test intensity 32 Single stimulus algorithm 33 Multiple Stimulus algorithm 34 Test status indicator 35 Extending the test 36 Adding and correcting presentations 37 Changing the supra threshold increment 38 Analysing the results ...

Page 4: ... patie nt s date of birth 77 7 Fixation targe ts 78 8 He lp facility 79 9 Printing the re sults of a fie ld te st 81 10 Re sponse button 82 11 Saving visual fie ld data 84 12 Vide o came ra Part V Options program 86 87 1 Addre ss 88 2 Backup 89 3 Compute r 90 4 Database 91 5 Drive rs Te sts 92 6 Save Cance l 93 7 Supra Te sts 94 8 Vide o Se tup Part VI Database program 96 97 1 Backup copy of the d...

Page 5: ...cification 118 Part IX Appendix 2 8000 Connection details 122 Part X Appendix 3 Installation 124 Part XI Appendix 4 Maintenance and warranty 128 129 1 Re gular inspe ction and mainte nance 130 2 Upgrading the softw are 131 3 Cle aning 132 4 Pre ve ntative mainte nance 133 5 Re place me nt parts 134 6 Re pairs and re calibration 135 7 W arranty Part XII Appendix 5 Troubleshooting 138 139 1 Backgrou...

Page 6: ......

Page 7: ...Part I ...

Page 8: ...nson Perimeter User Manual 2017 Elektron Technology 1 Welcome Henson 8000 Perimeter To find out more about the Henson range of perimeters visit http www elektron healthcare com or scan the QR code opposite ...

Page 9: ...n 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 not be disposed of with y...

Page 10: ...s not suitable for use in an oxygen rich environment The instrument is not suitable for operation in 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 a USB memory stick or other suitable removable media to avoid any possibility of data loss...

Page 11: ...nwards software Version 1 2 October 2014 Updated information on supra threshold tests database operations and general formatting Version 1 3 May 2015 Changes to patient instructions in the first person Additional formatting changes and corrections Version 1 4 November 2015 Formatting changes To determine the version of installed software click ABOUT on the main menu ...

Page 12: ...ormation 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 symbols are use...

Page 13: ...017 Elektron Technology 1 5 Ac knowledgements Microsoft Windows XP Windows 7 and Windows 8 are registered trademarks of Microsoft Corporation Adobe and Acrobat R reader R are registered trademarks of Adobe systems ...

Page 14: ......

Page 15: ...Part II ...

Page 16: ...start To start a visual field test or one of the menu bar items click over that item on the start up screen To ge t more he lp on a n ite m in the sta rt up scre e n click tha t ite m on the ima ge be low See Appendix 3 for installing and setting up the software 124 ...

Page 17: ... stimulus test After selecting the test and entering the patient s date of birth you will be presented with the Single stimulus supra threshold test screen below To ge t more he lp on a te st scre e n ite m click ove r the ite m in the ima ge be low 76 ...

Page 18: ...Multiple stimulus test After selecting the test and entering the patient s date of birth you will be presented with the Multiple stimulus supra threshold test screen below To ge t more he lp on a te st scre e n ite m click ove r the ite m in the ima ge be low 76 ...

Page 19: ...ew or an existing patient Depending on your response you will then either need to enter the patient s date of birth or select a patient from the database Once this has been done you will be presented with the ZATA test screen below To ge t more he lp on a te st scre e n ite m click ove r the ite m in the ima ge be low 57 76 57 ...

Page 20: ...User Manual 2017 Elektron Technology 2 4 Drivers test After selecting a Drivers test you will be presented with the Drivers test screen below To obtain more help on a test screen item click over the item in the image below ...

Page 21: ...Part III ...

Page 22: ...timulus ZATA Zippy 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 pat...

Page 23: ...multiple stimulus Both incorporate several levels of testing Both can be run in an age related or threshold related 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 Test Status indicator single stimulus only Analysing the results 29 24 35 31 77 31 31 34 38 ...

Page 24: ...timuli 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 in the first presentation was a false one 5 If there ...

Page 25: ...25 Visual field tests 2017 Elektron Technology ...

Page 26: ...omfortably Threshold 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 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 by measurement To begin with the lig...

Page 27: ... go back click Bwd All the patterns within the current test level are represented by a line of buttons along the bottom of the screen To go to a specific pattern click the pattern button Each of the pattern buttons gives the number of stimuli in the pattern This number starts off in green and goes to black once the pattern has been presented If there is a missed stimulus in the selected pattern th...

Page 28: ...hich 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 With the Miss button selected down click over the location of the missed stimulus or click the right mouse button when the cursor is over the missed location To correct mistakes i e remove ...

Page 29: ...e beginning of the test Stimuli that are not seen by the patient are presented a second time at the same intensity If missed on both occasions the stimulus is marked as a miss and presented at 8dB above the threshold estimate If missed at 8dB it will be presented at 12dB above the estimate A gray scale indicates the depth of defect 5 8 or 12dB The patient responds to each seen presentation by pres...

Page 30: ...u see a light flash 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 are a demonstration so do not w...

Page 31: ...ts When your machine was installed one of these techniques would have been set as the default method i e the method first selected when a supra threshold test is undertaken You can change the default method within the Options program You can also opt to change the method at the onset of a test For example you might want to regularly use the age setting method but then for a particular patient mayb...

Page 32: ...t s age It uses a repetitive bracketing procedure with 1dB steps until six presentations have been made at all four locations 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 aver...

Page 33: ...ting 1 3 until the threshold has been established 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 intensit...

Page 34: ...ible statuses Ready to begin testing Click Go to Start Paused Click Go to resume At the start of single stimulus tests a series of presentations are made where the responses of the patient are not saved Display when establishing the threshold in a threshold related supra threshold test Testing in the supra threshold mode The test has finished This is displayed during the test sequence in a Drivers...

Page 35: ...xtent of any visual field loss To go to the next level click on the tool bar The figure below shows the distribution of stimuli in the three levels of the central visual field test 26 68 and 136 Locations Additional stimuli can be presented manually One of the important benefits of having a multi level test is that the perimetrist does not have to decide on how many stimuli to test at the onset of...

Page 36: ...yed chart Add allows you to add or re test a location Miss allows you to mark an already tested location as missed Rmv allows you to re classify a location marked as Missed With the Miss and Rmv actions the level post click is dependent upon the supra test increment 5 8 or 12dB The current value is given by the button that appears down 5dB on the figure below This can be changed by clicking over t...

Page 37: ...will come back to the location and re test it at the same intensity If it is missed a second time it will come back to test it at 8dB above threshold and if missed at 8dB then at 12dB above threshold Multiple stimulus In the multiple stimulus supra threshold test the program starts off testing at 5dB above the threshold estimate If the patient reports less than the correct number of stimuli then t...

Page 38: ...le see below divided into 3 regions normal suspect and defect The borders correspond to 10 normal suspect and 0 1 suspect defect probability values The length of the blue bar represents the confidence of the estimate The length is dependent upon the number of tested locations it shortens as the number increases This calculation is based on a scoring system applied to the visual field data The scor...

Page 39: ...s both eyes Start new Patient same test Open the help file context sensitive Swap eyes without losing data Select method for establishing the threshold Extend test to the next level Fixation targets Action when clicking over chart area of screen Supra threshold increment Status of patient Response button Single Stimulus tests 82 79 78 74 31 35 77 36 37 81 ...

Page 40: ...ast 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 appropriate fo...

Page 41: ...41 Visual field tests 2017 Elektron Technology ...

Page 42: ... 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 fail to find the patient s blind...

Page 43: ... 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 Yes in the following pop up window 2 Instruct the patient to look at the centre of the four lights and to press their response key when they see a light flash at the centre of...

Page 44: ...Technology 3 2 3 Global Indice s Global indices are single numbers that characterise the whole visual field They are used to monitor the extent of loss over time There are 3 provided with the ZATA test Mean Defect Standard Deviation Hemifield Test ...

Page 45: ...t As the name implies 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 bel...

Page 46: ...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 however particularly sensitive to lens rim artifacts 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 W ithin Norma ...

Page 47: ...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 it is Borderline or Outside Normal Limits it also give a p value 10 5 2 1 0 5 The figure above shows the global indices as app...

Page 48: ...appear on the menu bar The currently displayed format is represented by the button that appears to be down Defect By clicking one of the alternative buttons you can change the displayed format Gray displays the results in a gray scale format Thresh displays the threshold values dB Defect displays the defect values dB 50 49 51 ...

Page 49: ...hold Threshold values are displayed on a chart The value is 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 ...

Page 50: ...2 Gray Scale The Gray Scale chart gives an interpolated plot of the threshold values which makes it easier to see where there are areas of reduced sensitivity dark areas The above figure shows the Threshold left and Gray Scale right results of the standard printout ...

Page 51: ...t the variability in threshold estimates at each test location Positive values indicate a higher than average sensitivity The above figure shows the Defect left and Pattern defect right values as seen in the standard printout Absolute values at the top and probability symbols below Example If the measured threshold was 25dB in a person of 40 years of age and the normal value for that location was ...

Page 52: ... less sensitive eye than that of an age matched normal maybe they have some media opacities then the Pattern Defect values will be lower than the Total Defect 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 Defect calcu...

Page 53: ...Visual field tests 2017 Elektron Technology The above figure shows the Defect left and Pattern defect right values as seen in the standard printout Absolute values at the top and probability symbols below ...

Page 54: ...rint Out Below is a copy of a print out from a ZATA threshold test Patient demographics and details of the Field test 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 55: ...oing 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 you can hold down the response button The test will pause until you release the response button The first few p...

Page 56: ...imuli 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 Stimulus locations Left 30 2 24 2 excluding red locations Right 10...

Page 57: ...nt or use the Find buttons 2 Highlight the required record usually the last record for the patient and then click Load 3 The patient s name record number date of birth etc will be loaded and if the selected test is a threshold test with the same distribution of stimuli the threshold data will be loaded ready to start testing from prior values If you select a new patient the following data entry fo...

Page 58: ...rly the objective of perimetric programs is to make the test as accurate and as fast as possible One way of reducing the number of presentations is to start off close to the patient s threshold For a new patient the best estimate of their threshold is based on their age However when the patient has already been examined with a Threshold test the Prior values provide a much better estimate particul...

Page 59: ...esults both eyes Video camera settings Start New Patient same test Open the help file context sensitive Repeat this eye start again Swap eyes can be done at any time without losing data Blind Spot re locate Extend test to the next level Test fovea Fixation targets Display format Indicates when patient Response button is pressed 82 79 84 78 74 42 35 43 77 48 81 ...

Page 60: ...th Drivers Tests are binocular with a fixed intensity stimulus 10dB 318 4cd m2 with the Goldmann equivalent background intensity 10cd m2 When performing a Drivers Test the patient s forehead should be placed in the middle of the head rest The Drivers Tests are single stimulus tests and the patient responds to each seen presentation by pressing a response button The drivers tests incorporate a numb...

Page 61: ...erately 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 turning your head slightly if necessary You must keep your eyes as still as possible If you want to take a break hold down the response butt...

Page 62: ... an option to have a minimum value for the beep volume Min volume On The UK DVLA require a beep 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 when set to the extreme left 86 ...

Page 63: ...63 Visual field tests 2017 Elektron Technology 3 3 3 Stimulus locations The patterns of the stimuli in the Group 1 and group 2 Drivers Tests are shown below Group 1 120 point test Group 2 124 point test ...

Page 64: ......

Page 65: ...Part IV ...

Page 66: ... printing and storage of both eyes as a single record You do not need to print and or store each eye individually The use of multiple stimulus presentations in its Supra threshold tests Rapid response times to operator commands Rapid access to records in its Database with hot key options a vertical slider and a find facility Click and touch screen operation with hot keys Most commands requiring a ...

Page 67: ...ine Help Advanced context sensitive help facility that gives fast feedback to users when needed Advanced analysis routines The results from a Supra threshold test are continually analysed in a way that tells you the likelihood of the result coming from a normal patient The analysis takes into account the number depth and clustering properties of the currently missed stimuli The ZATA Threshold test...

Page 68: ...al field test the patient needs to be carefully instructed on what the test is about and how they need to respond They need to have the correct refractive correction in front of the test eye and an occluder in front of the other eye The patient also needs to be carefully positioned at the instrument 70 71 69 ...

Page 69: ...Elektron Technology 4 1 1 Aligning the patie nt The patient should be seated comfortably with their head as shown below The head should be at approximately at approx 45 degrees with their forehead resting against the forehead pad ...

Page 70: ...tions 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 Multiple stimulus supra threshold b Single stimulus supra threshold c ZATA d Drivers 26 30 55 61 ...

Page 71: ...ter lenses which attach to a special frame This set overcomes the problem of lens rim artifacts that are common when trial case lenses are used with a lens holder attached to the perimeter When using the special lens set the front panel should be removed An occluder is placed in front of the eye not being tested Recommended additions lens power to be added to the patient s current distance prescri...

Page 72: ...ter stimulus interval will be reduced the speed of presentations increases If they respond slowly the inter stimulus interval will increase the speed of presentations will decrease The perimetrist can manually adjust the speed of presentations at any stage of the examination by dragging the Response Time slider or clicking the arrows at either end The Auto timing can also be turned on or off at an...

Page 73: ...ample False positives 3 10 would indicate that the test had made 10 false positive catch 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 of the total number of trials False negatives increase if there is a visual field defect This is due to the increased variability of the patien...

Page 74: ... eye being tested Right eye is Occluded Note Swapping from one eye to the other during a test will not result in any loss of data This facility is particularly useful when screening the visual field with supra threshold stimuli If the first eye was OK and the second eye showed up a defect then it is possible to go back to the first eye and test some more locations now that the suspicion of a defec...

Page 75: ...nses 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 first few presentations do not count If further demonstration is required then the perimetrist should stop the test and start again after re instructing the patient ...

Page 76: ... of birth The Henson 8000 requires the operator 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 Enter The date of birth is used to establish the age normal threshold values ...

Page 77: ...s 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 You can switch between fixation targets at any stage of the examination by clicking The appearance of the button represents the current fixation target ...

Page 78: ... help while a program is running Opening and closing the Help facility will not affect the Henson program and 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 79: ...selected the PDF will be produced with spaces for you to write the information in after printing 1 To print the results of a field test click Print on the toolbar 2 If you have not tested both eyes you will be prompted to continue 3 If you have the options set to enter patient information on the printout then you will be presented by the window below where you can enter the details 4 Press print t...

Page 80: ...dow asking you to select the printer etc Notes Results for both eyes are printed at the same time In the Supra Threshold tests results for the right and left eyes are placed side by side The Zata test results are printed one eye to a page The Practice name and address will appear on the printout along with any patient details entered when saving the visual field data in the database 87 82 ...

Page 81: ...structed to click the response button each time they see a stimulus When pressed and held down the response button will pause further stimulus presentations This is useful if the patient needs to temporarily pause testing During a test the status of the response button is given in the toolbar by the indicator Response button down Response button up 59 ...

Page 82: ...h you can Enter edit the record Family name record number and date of birth are required fields these are used for sorting and filing the data Other fields are optional Only use the following characters in the family name or record number Letters A Z Numbers 0 9 and hyphen Visual acuities are selected from Drop Down boxes refractive errors from Scroll boxes Sphere Cylinder and Axis If working from...

Page 83: ...83 General information 2017 Elektron Technology practice management systems For details on the coding of file names please contact your supplier ...

Page 84: ...nitoring a patient s fixation To adjust the camera settings 1 Click to display controls Shown above with blue background 2 Drag the brightness and contrast sliders to the desired level 3 Click to remove controls The settings are saved for future use The settings can also be adjusted within the Video tab of the Options program 94 ...

Page 85: ...Part V ...

Page 86: ...sual field test and the associated programs First of all you need to close ALL Henson programs including the Start up screen Then Run the Options program from the Windows desktop icon You will then be presented with the tabbed Options entry form shown below To ge t more he lp on a n O ptions ite m click ove r tha t ite m on the ima ge be low ...

Page 87: ...n enter your practice name and address This will then appear at the bottom of any printed charts 1 Use the on screen keyboard or an external keyboard to make changes 2 Click Save Note Clicking Save will save all the changes you have made in this session not just those on the current tab ...

Page 88: ...fault database and can be any type of drive except a CD rom drive For example E Henson_backups Only the location is specified the database name will be the same as the current database The database is automatically backed up to the external folder every time you save a visual field record You can make a copy of the database using the Utilities program When clicking Save within a test the software ...

Page 89: ...base on a separate computer and to allow training and demonstration of the software The software has the ability to allow you to enter a patient s details on the printout even if you are not going to save it If the record details on printout box is ticked you will be prompted to enter details when you press the print button Ticking the onscreen keyboard box means that a pop up keyboard will appear...

Page 90: ...To set the database path name 1 Select the Drive letter This will normally be the internal C drive of the computer but could be any other drive to which the computer has access e g a file server 2 The directories available on the selected drive will be displayed in the Directories list box Select the one you wish to use 3 The database files within that directory will be listed in the Files list bo...

Page 91: ...f the beep that occurs with each stimulus presentation The minimum setting is normally off However the UK DVLA requires Drivers Visual Field tests to have an audible beep i e you should not be able to turn it off To accommodate the DVLA requirements we have added a check box that when checked meets this requirement The minimum setting will be a quiet beep rather than off Checking this box has no e...

Page 92: ...ve Canc el In the Options program each tab has a Save and Cancel button Once you have made the required changes click on any of the tabbed pages The changes on all the pages will be saved and the options program will close To return without saving any changes click ...

Page 93: ...tab that allows you to set certain characterisitcs of the supra threshold tests You can select Whether the threshold is set by age or by measurement you can override this at the onset of a test Whether the program starts off at level 1 26 points or 2 68 points Whether the program auto extends after level 1 32 31 ...

Page 94: ... image Use the In Out buttons to adjust the image zoom factor note this is a digital zoom so image quality is reduced at high magnification 1 Use the up down left right buttons to position the image in the video window 2 Adjust the Brightness and Contrast sliders to optimise the video image display these can also be adjusted when running a test program 3 Click Save ...

Page 95: ...Part VI ...

Page 96: ... display You can move up and down the list with the arrow keys page keys and by dragging the vertical slider bar To ge t more he lp on a Da ta ba se ite m click ove r tha t ite m on the ima ge be low The location of the database is defined in the options file To print a chart first select the record you wish to print then move your cursor over the field chart A toolbar will appear as shown above w...

Page 97: ...so defined in the Options file If your backup location is not available e g USB pen drive not attached then you will get a warning message when you attempt to save You can continue to save the record without a backup copy This backup will ensure that you do not lose your data in the unlikely event of a hard drive failure Important You should pe riodically make an additional copy of the database an...

Page 98: ...he file defined in the options program Use the method below to view data from a different database To save future records into a different database you will need to make it the default database using 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 OK Note When you next collect and save visual fie...

Page 99: ...ology 6 3 Deleting a rec ord from the database To delete a record from a database Select the record to be deleted by clicking it within the list of records 1 Click 2 When prompted click OK to confirm Once deleted a record cannot be retrieved ...

Page 100: ...y contain an error To edit a record Click the EDIT button to see the edit screen below Use either the on screen keyboard or an external keyboard to edit the data in the fields Once you have made your changes click SAVE Note You cannot use the following characters in patient name or record number as these are used for the file name of the PDF printout To correct the stored PDF file after modifying ...

Page 101: ...into the search box on the toolbar below A keyboard will appear if the option is set in the OPTIONS program as you type on this keyboard or the computer keyboard the database will find the nearest match to the text in the search box To close the keyboard press the enter or ESC buttons Notes The system searches for the nearest match For example if you search on Family name and press H you will see ...

Page 102: ...displayed on the Database Screen When this occurs you can move through the list by Pressing the up down arrow or Page keys Dragging the vertical slider up or down Note The order of records is initially sorted by family name FamName You can sort by record number RecNum or testdate DoT by clicking on the appropriate column header You can also search for a specific record by clicking Find 101 ...

Page 103: ...ese sub directories where the PDF files can be found In this case there are 2 sub directories because there are 2 databases FLD8 and More The database has a facility to recreate missing pdf files if for example a database is restored from a backup the pdf files can be created Press the PDF button on the toolbar and you will be asked whether to create a PDF for the currently selected record or all ...

Page 104: ...from the Database a Select the patient who s record you wish to print by clicking over it in the list b Press the print button on the toolbar c The currently displayed PDF will be opened in Adobe reader as shown below Click the Print icon on the toolbar and follow the on screen prompts to select your printer ...

Page 105: ...cord the raw data is stored in the database and a copy of the printout PDF file is created for future printing and use by practice management systems If you loose a PDF file or edit the data then you can re create it by clicking Note The PDF files are stored in a sub directory of the database file 103 ...

Page 106: ......

Page 107: ...Part VII ...

Page 108: ...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 ge t more he lp on a utilitie s scre e n ite m click ove r tha t ite m on the ima ge be low 90 ...

Page 109: ...ions program To view records from a different database 1 Click on the Utilities toolbar 2 Select the drive directory and database from the drop down menus 3 Click OK 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 90 90 ...

Page 110: ... from the drop down menus 3 Enter the file name for your new database it must end with db in the text box top right of the form 4 Click OK Notes You can use the on screen or external keyboard to enter the file name The file name must end in db If you want to create a new folder click then enter the name of the folder in the displayed box and select OK When the database is created a folder will be ...

Page 111: ... removable drive and directory from the drop down menus 3 Click OK 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 f...

Page 112: ...ektron Technology 7 4 Deleting a rec ord To delete a record within the database a Select the record to be deleted by clicking it within the list of records b Click c When prompted click OK to confirm Once deleted a record cannot be retrieved ...

Page 113: ...nd wait for windows to recognise it 3 Click on the Utilities menu bar 4 Select the USB pen drive letter e g E from the drop down menu 5 In the left hand panel open the directory on the pen drive containing the data you want to merge 6 In the right hand panel select the database file db that you want to merge the data to 7 Click OK Depending on the size of the database this operation may take a few...

Page 114: ...re in a particular study In the instructions below The Source database contains the records you want to transfer and the Target is the database into which you are transferring records To transfer records 1 Open the Target database 2 Click on the Utilities toolbar 3 Select the Source drive directory and database from the drop down menus 4 Click OK 5 Both sets of database records are now listed in t...

Page 115: ...urrent database 1 Insert a USB pen drive containing the data to be imported and wait for windows to recognise it 2 Click on the Utilities toolbar 3 Select the USB drive and any sub directory to find the file of the data you want to import 4 Click OK 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 ...

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Page 117: ...Part VIII ...

Page 118: ...4 cd m2 0 05 10000 asb Presentation time 200ms The background luminance is controlled with additional LEDs having broad spectral output ranging from 400 740nm 3dB down Background luminance 3 15cd m2 or 10cd m2 10 or 31 5asb dependent on test 3 FIXATION MONITOR Heijl Krakau technique in ZATA On screen image of eye presented via CCD camera located below the central fixation LED 4 FIXATION TARGETS Re...

Page 119: ...ATION Mains operated Class 1 Type B Applied Part headrest pad and patient response button Continuous operation Equipment not suitable for use in presence of flammable anaesthetic mixtures with air or oxygen or nitrous oxide Ordinary equipment without protection against ingress of water 1 11 ENVIRONMENT Te mpe rature Operating 5 to 35 C 41 to 95 F Storage 20 to 50 C 4 to 122 F Relative humidity 10 ...

Page 120: ...he following accessories and detachable parts Set of spares in case consisting of fuses and bulbs Patient response button and cable assembly Mains lead for Henson Back up of installed software This may be held on the internal Hard disk Occluder eye patch Dust Cover This Operating Manual 13 OPTIONAL EXTRAS Electric Table without top Custom made top with Printer carrier Perimeter Trial Lens set 14 L...

Page 121: ...Part IX ...

Page 122: ... standard 10 100Mbps Ethernet The USB2 0 ports are A type for a printer or external storage device There are 2 USB ports under the rear of the unit and one on the front panel The patient response button is plugged into the jack socket under the right hand side of the unit when viewed from the patient side The photo below shows the mains input connector incorporating the fuse holder the 2 USB ports...

Page 123: ...Part X ...

Page 124: ... socket must be maintained at all times as this is the means of isolating the device from the mains supply For USA Canada The supplied Hospital grade mains cable 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...

Page 125: ...er Insert the supplied USB flash drive into the perimeter Select Open folder to view files Open the folder called Software and double click on the software EXE file Follow the on screen instructions to install the software Wait for the Henson to complete its start up sequence approx 30 40 seconds Open the Henson Options program by double clicking on the computers desktop Click on the Computer tab ...

Page 126: ...eter User Manual 2017 Elektron Technology Note To save records and use the database you will need to have the free AdobeT M Reader installed This can be obtained from the support website www elektron healthcare support ...

Page 127: ...Part XI ...

Page 128: ...he 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 Warranty 129 131 1...

Page 129: ...n inspected by a competent person Particular attention should be paid to the mains cable 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 recessed panel underneath the Henson 1 To change the fuses remove the mains lead from the wall socket and then from the socket on the rear of the Henson...

Page 130: ...grades of the software and documentation are available to download from the support section of the Elektron healthcare web site http www elektron healthcare 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 131: ...en Dust and small deposits on the stimulus display screen can be blown 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 sterilising wipe Patient Response Button The response button should be wiped ...

Page 132: ... 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 sales agent s websites www ...

Page 133: ...spare parts are available from the supplier Item Part number Dust cover TNSUN9306 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 The software part number will change with later versions of software Contact the supplier for the latest part number ...

Page 134: ... 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 Henson 8000 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 conta...

Page 135: ... 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 to alter the...

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Page 137: ...Part XII ...

Page 138: ...on 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 ha...

Page 139: ...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 illuminators Clicking continue will proceed with the test Data collected will not however be va...

Page 140: ...n Perimeter User Manual 2017 Elektron Technology 12 2 Bowl error A Bowl error message will appear when the communications with the bowl do not appear to be working If problem continues contact a service engineer ...

Page 141: ... chin rest is still not working then contact the service agent 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 ensure they are replicating a mouse Some touch screens have a setting where the normal mouse button clicks are not replicated by presses on the screen Try operating the on screen buttons using a left cl...

Page 142: ... 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 143: ...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 This usually occurs if a test for this patient has already been saved ...

Page 144: ...gram 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 the help button attached to the message Some further detail on some of these messages is given through the following links Test not recognised Database warning 145 ...

Page 145: ...the Database Backup is the pen drive fitted inside the housing of the Henson 8000 If the Database Backup locations is not available e g the pen drive has been removed then you will get this warning message Continuing will save the data in the database but obviously not in the backup When you re establish the backup e g re insert the pen drive and save edit another record the backup will be restore...

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Page 147: ...Part XIII ...

Page 148: ...art 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 149: ...Part XIV ...

Page 150: ...and is a standard RJ45 network connection The Henson 8000 is supplied with an 802 11N Wi fi network adapter that supports the following network protocols WMM WMM PS IEEE 802 11 Qos Standard 64 128 bit WEP WPA TKIP with IEEE 802 1x WPA2 AES with IEEE 802 1x for high level security The adapter has been configured tested and then removed It will be in the spares kit To join a wireless network 1 Exit ...

Page 151: ...e following windows location 5 Windows C Backup8000 Wireless Startech 6 7 Double click on Setup as shown above 8 Click yes on the User account control window 9 Select the WIFI N USB 802 11N Adaptor option See below for details 10 11 Select the Windows option as highlighted by the arrow below ...

Page 152: ...es see below to restart windows 16 Once the unit has restarted a wireless network icon will appear on the desktop as shown below 17 18 Double click on the RealTek 11n USB wireless icon to open the program 19 Click on the Available network tab shown below If there wireless networks in range then they will be shown as an available network To set up the connection the name and security password for t...

Page 153: ...Networking 2017 Elektron Technology 20 Uninstalling Wireless Network 1 Double click on the Realtek USB wireless LAN utility icon on the desktop shown below 2 3 Ensure the Disable adaptor box is checked As shown below ...

Page 154: ...154 Henson Perimeter User Manual 2017 Elektron Technology 4 5 Click on the Windows start icon and from the program select the RealTek 11n USB wireless icon and then click the Uninstall option 6 ...

Page 155: ...155 Appendix 7 Networking 2017 Elektron Technology 7 Follow the on screen instructions to remove the driver from Windows 7 ...

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Page 157: ...ecord 99 editing records 100 find record 101 import earlier format database 115 introduction 96 Key violation 143 navigating 102 PDF file location 103 print record 104 save records as PDF 105 searching 101 transferring records 114 Database backup 111 Date of birth 76 Default database path 90 Default test level overriding 31 Default threshold 93 Defect 52 Delete database record 99 Demo mode 17 18 D...

Page 158: ...ess 87 Present button 18 27 Print database record 104 Print results 39 59 Px Resp button 81 Q Quick start 16 R Recor transferring to another database 114 Record printing 104 save as PDF 105 Refractive correction 71 Relocate blind spot 42 Repeat eye test 59 Response button 39 59 81 Response time 72 Retest 28 36 Rmv button 28 36 S Save database records 105 Save visual field data 39 59 82 Search data...

Page 159: ...s 114 U USB copy database 111 USB device 89 Utilities copy to USB 111 create new database 110 import data from 6000 database 115 introduction 108 merge databases 113 open existing database 109 transfer records 114 V Video camera 84 Video settings 59 84 94 Volume Drivers Tests 91 Z ZATA 22 40 new existing patient details 57 ...

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