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EyeCheck: The EyeCheck function contains three patterns: (1) Snellen
Chart (2) Amsler Grid (3)Astigmatism.
1.
2.
While focusing at the center point, check that all the lines are
straight.
3.
Check that each line is of the same width.
3-4
Snellen Chart
P1
L11
L10
L9
L8
L7
Amsler Grid
Astigmatism
P2
L6
L5
L4
L3
Chapter 3: General Instruction
P3
L2
L1
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