3-4
Chapter 3: General Instruction
• EyeCheck:
The EyeCheck function contains three patterns: (1) Snellen
Chart (2) Amsler Grid (3)Astigmatism.
1. Snellen Chart
P1
P3
L11
L10
L9
L8
L7
P2
L6
L5
L4
L3
L2
L1
2.
Amsler Grid
While focusing at the center point, check that all the lines are
straight.
3. Astigmatism
Check that each line is of the same width.
Содержание VP299CL Series
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