OM t of c.iii - Vision Research Coordinating Center - Washington ...

1/1/2005 Chapter 8 Corneal Curvature and Topography page 8-16
Patient confidentiality is maintained as follows: From the main menu select
patient examination. If new, enter the patient’s full CLEK ID number into the “Patient
Last Name,” “Patient First Name,” and “Patient ID #” fields.
The measurement procedure is as follows:
(1) Insert CLEK Syquest disk (or equivalent).
(2) From main menu select Patient Examination.
(3) Enter Operator’s Initials. Select OD and appropriate exam protocol button.
(Note: EyeSys System 2000 has four exam protocol buttons. Select one that will
automatically save the Eye Image and Exam Data. For additional information, see
“Custom Exam Protocol Setup” below).
(4) Choose patient. (If new, enter the patient’s full CLEK ID number into the
patient “Last Name,” “First Name,” and “Patient ID #” fields, and enter CLEK as the
group. Once you have chosen the patient you are ready to capture an image.
(5) Position the patient with his or her chin resting comfortably on the chin rest
and forehead on the forehead rest.
(6) Ask the patient to fixate the blinking green light inside the central ring using
the eye being tested.
(7) Align and focus the instrument by placing the central reflected ring inside the
square.
(8) While maintaining centration and focus, adjust the joystick to bring the cross
hairs into the center of the white circles located in the horizontal, peripheral regions of
the image.
(9) Ask the patient to blink and maintain fixation on the green light upon eye
opening (as widely as possible).
(10) Upon eye opening and after verification of centration and focus, press the
enter key on the keyboard.
(11) Verify that processed image has been digitized correctly. If OK, press accept.
Edit (delete) points placed on the lid margin and/or limbal rings. DO NOT add points.
(12) Discard pupil placement.