
1-4
Chapter 1: Product introduction
1.3.3
EyeCheck function
The EyeCheck function contains three patterns: (1) Snellen Chart (2) Amsler Grid (3)
Astigmatism.
1. Snellen Chart
P1
P2
P3
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.