Keratron™ Installation and operating manual
OPTIKON 2000
Cod. 161501EN
7-11
2014-04-23
Rev.0
The Pupillometry (8) button switches the illumination from visible to infra-red. The
operator, after waiting a few moments, can acquire one or several images that when
processed enable us to trace the pupil margin in scotopic conditions
In topography with the Keratrons, for image acquisitionit is not indispensable to
perfectly center the rings with the cross, since a specific algorithm adequately
compensates for the lateral movement within the first 2-3 mires. Instead it is
necessary to move forward, always moving slowly, near the right distance from the
corneal apex, avoiding hitting the patient with the mires cone, then asking him to
blink
and then
open both eyes very wide
. avoiding hitting the patient with the
mires
cone, then asking him to
OK
position and press the button within a few seconds, so
as to avoid breaking the lacrimal film and to avoid
eyelash effects
(refer to the last
page of the manual). If the patient blinks, discard the photograph using [Discard] (7)
and repeat the operation.
NOTE:
Be careful not to hit the patient with the cone when moving the Keratron
™
forward.
To this end, instead of sitting behind the display, it is advisable to constantly observe
from above the position of the cone with respect to the eye.
Adjust the XYZ cart so as to prevent the cone from hitting the patient's nose or
eyebrow. Adjust the height of the table and the chin-rest to obtain a position that is
as stable as possible.
After acquiring an image, press [Process] (1) to cause the image itself to be
processed, and the rings will appear at the edges of the reflected mires as shown in
Figure 7-24. This operation makes it possible to immediately discard images altered
by lumps in the la
crimal film or accept them to be corrected with the Scout’s "points
editor" .
Pressing [Photo] (2) will cause the rings to be hidden. Pressing [Rings] (4) will cause
them to reappear.
The processed images can be shown with an absolute or axial color scale map of
the curvatures by pressing [Curvature](4) or [Axial] (5) respectively.
