User Guide

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Chapter 1: Product Introduction
1.5.3 EyeCheck Function
The EyeCheck function contains three patterns:
• Snellen Chart: Select one of the three available eye charts to measure
visual acuity.
L0.1
L0.2
L0.4
L0.5
L0.6
L0.3
L0.9
L1.0
L1.2
L0.8
L0.7
• Use the or button to toggle the selection.
• Amslter Grid: To check all lines should be straight while focusing at the
center point.
• Astigmatism: To check each line should be the same width.
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