Nidek Medical ARK-1S, Operator'S Manual, Page: 100 / 112

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DEVICE SETTINGS AND MAINTENANCE: AR/KM Measurement Accuracy Check
4.6 AR/KM Measurement Accuracy Check

To check the accuracy of measured data, use the provided spherical model eye. The spherical model
eye is incorporated with a contact lens holder.
1
Remove the two fixing pins and the stack of chinrest paper from the chinrest.
2
Remove the cap from the spherical model eye and put the model eye on the chinrest
with its lens toward the measuring window and then insert the fixing pins.
Check the lens surface of the model eye for soiling.
3
Align the level of the spherical model eye with the eye level marker by operating the
chinrest up/down / button.
4
Set the “1. STEP” parameter to “0.01D”.
Setting Parameters

(page 77)
5
Perform AR and KM measurements in the same manner as normal AR and KM mea-
surements.
CAUTION
• If the measured result is higher than the value indicated on the model eye, contact NIDEK or your
authorized distributor.
• Always store the model eye with its cap on.
If the lens surface is soiled or flawed, measurement accuracy cannot be properly checked.
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