Nidek Medical ARK-1S, Operator'S Manual

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OPERATING PROCEDURE: Corrected Visual Acuity Measurement (Subjective Refractive Error Measurement)
3.5 Corrected Visual Acuity Measurement (Subjective Refractive
Error Measurement)

Subjective refractive error measurement and corrected visual acuity measurement can be performed
based on the AR-measured values (or large area measured values
*1
).
For the CYL and AXIS values, AR-measured values (or large area measured values) are used.
*1. Measured values to be used can be set by the “95. L. DATA SELECT” parameter.
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U
0.1
0.25
0.32
0.4
0.5
0.63
0.8
1.0
1.25
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9$
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±
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µ
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1 The VA chart presented to the patient is displayed.
2 Recall
Switches to the uncorrected eye condition (or LM data condition) for vision
comparison.
3
Chart up
Changes the VA value of the chart to be presented.
Chart down
4 Contrast/glare Changes in the order of the low contrast VA test and glare VA test.
5 Return Returns to the AR (AR/KM) measurement screen.
6
SPH up
Changes the SPH value of the corrective lens (subjective refractive error).
SPH down
7 Near
Presents a chart in near visual acuity measurement mode.
Addition power measurement is performed in near visual acuity measurement
mode.
8
VA measured values - VA: Corrected distance visual acuity, LOW C: Low contrast visual acuity, GLARE:
Glare visual acuity, and NEAR: Near visual acuity
9 Corrective lens value (0.25 D increments, SPH value changeable)
10
AR-measured (or large area measured) median values (or the latest values when the median values
have not been obtained).