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

1/1/2005 Chapter 8 Corneal Curvature and Topography page 8-24
(1) Enter a letter identifying the clinic followed by the last two numerical digits of
the patient ID in the screen labeled “patient last name”.
(2) Enter the last two letters of the patient ID in the screen labeled “patient first
name”.
(3) Record the patient’s complete ID number on an adhesive diskette label with
the addition of the eye, the examination type, and the date (month-day-year).
(4) Place the diskette label on the 3-inch floppy diskette.
Example of Mastervue Patient Information Screen: F45 (under Last Name)
Example of Diskette Label: BF106045-ZZ OD 01-01-97
8.7.3 Humphrey Mastervue Protocol
The measurement procedure is as follows:
(1) Clean the head and chin rest with alcohol and allow to air dry.
(2) Position the patient with his/her chin resting comfortably on the chin rest and
forehead resting on the forehead rest.
(3) Adjust the chin rest up or down so that the patient’s eye aligns with the
blinking red light.
(4) Ask the patient to fixate on the blinking red light in the center of the ring
image.
(5) Using the joy stick, move the instrument head left, right, up, or down until the
cross hairs are centered in the smallest ring of the live image. Use the joystick to move
the instrument head forward or backward until the proper focus is achieved.
(6) Ask the patient to blink and then open the eye as wide as possible.
(7) Press the button on top of the joystick to capture the image.
(8) Instruct the patient to relax outside the instrument while processing the
image. The screen will display “Processing” while it processes the captured image and
will display “Storing” while it saves the captured image.
(9) When the live image reappears, re-focus and re-align using the joystick.
(10) Press the button on the joystick to capture another image.