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6. Prism Display
Display the prism zone on screen.
7. Cylinder Sign
Current cylinder sign is marked as ±, + or - .
8. Measurement Lens Activation
Indicates the type of lens (single lens, left or right) currently being measured.
8.2. Progressive Lens Screen
Progressive lens screen composition
1. Distance Viewing Zone
Measurement Position
2. Distance Viewing Zone
Measurement Position
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