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1. BEFORE USE
• AC/A
The AC/A ratio test starts.
You can also start this test with the function button after the phoria test.
• Single ratio contrast
When a LC (liquid crystal) visual acuity chart is connected, it is possible to display a
contrast chart.
You can select the contrast from the following values.
100%, 50%, 25%, 12.5%, 10%, 5% and 2.5%
• Plural ratio contrast
When you connect a LC visual acuity chart and select a chart of 3 lines and 5 columns,
the characters are displayed from the left in the order of contrast 25%, 12.5%, 10%, 5%
and 2.5%.
• Exit contrast exam
Finishes the contrast test.
• Astigmatism simulation
When a LC visual acuity chart (excluding PC-50SB) is connected and the astigmatism
test chart is displayed, the astigmatism simulation is executed.
• Prism simulation
When a LC visual acuity chart is connected and the phoria test chart is displayed, the
phoria simulation is executed.
• Coincidence simulation
When a LC visual acuity chart is connected and the aniseikonia test chart is displayed,
the aniseikonia simulation is executed.
(4) Reference Data
• Show
The reference data is displayed.
• Hide
The reference data is hidden.
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