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PRK-8000 Operation Manual
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(3)
Perform alignment and Focusing
CAUTION
Do not place your hand or fingers between the stage and base. Also
ensure that the examinee does not place his/her hand or fingers there
either. Otherwise, hand or fingers may be hurt.
Slide the operation lever to the left so that the right eye of the examinee is displayed on
the monitor.
Ask the examinee to look at the red roof in the center of the scene (eye fixation target).
Looking at the monitor, check that image of the mire ring is not obscured by the upper
eyelid. If it is covering the ring, instruct the examinee to keep his/her eye opened wide
until measurement ends. Or help them open the eye wider by lifting up his/her upper
eyelid lightly with your fingers.
Looking at the monitor, incline the operation lever to right or left, and turn the operation
lever so the pupil is concentric with the inner alignment mark. If the pupil is large, align it
with the outer alignment mark.
Focus on the mire image by inclining the operation lever forward and backward. The
focus is correct, the color of the aiming mark changes to yellow color.
NOTES:
①
Slide stage to the forward/backward and right/left if you are unsatisfied with
the operation lever control.
②
If the alignment marks and the pupil are not concentric, instruct the examinee
to look at the red roof at the center of the picture. Otherwise, measurement
error may occur due to aberration.
Содержание PRK-8000
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