Keratron
®
Scout Installation and Operating Manual
OPTIKON 2000
7.3 HOW TO ACQUIRE A GOOD IMAGE
Acquiring an image is the most critical operation of topography. Care must be taken
to capture the image moving slowly to the proper vertex distance every time and to
avoid bad tearing and
eyelashes artifacts
(see the last page in this manual).
An automatic focusing device located on the cone apex lets you capture images only
if the eye vertex is at a correct working distance, provided the eyelashes do no
interfere.
From the ACQUIRE menu, select “New Image”; the IMAGE ACQUISITION window
will appear on the display.
Press either the OD or the OS key to select the eye to be examined; an intermittent
sound will indicate that the instrument is ready to begin acquisition (pressing the CLR
key will cancel the selection and allow a new one).
7.3.1 THE SLIT LAMP CONFIGURATION
When moving forward the Keratron
®
Scout, be careful not to hit the
patient with the cone.
Adjust the cone vertically and slightly rotate the adapter sideways so to avoid that the
cone hurt the nose or the eyebrow of the patient. Adjust the height of the table and of
the chin rest as to obtain the most stable position.
Use the joystick of the slit lamp to center the cross on the monitor at the center of the
rings while getting near to the eye. It is not necessary to be extremely scrupulous in
this operation, as the software will compensate automatically the possible
decentration. If the acquisition time should be too long, the patient eye could get tired
and the lachrymal film could break.
While centering, use the joystick of the slit lamp to get to the proper distance from the
eye. The lower LED, with an arrow pointing upward indicates that you should move
closer to the eye. The upper LEDS with arrows pointing downwards indicate that you
should move back from the eye; if the arrow inverts its direction pointing upwards, the
correct focusing has been exceeded. Correct focusing is reached when the central
OK LED is on.
You may capture up to eight images.
Discard the bad pictures at once, if they were clearly moved or taken while the
patient was blinking, by pressing CLR.
Cod. 161204EN
7-2
2008-12-03 Rev.B