Operation Manual
49
6.3. Vertical mask
Allows you to select vertical mask over selected optotype chart.
1. To activate press .
2. Use Arrows to move mask in any direction.
3. Press again to deactivate.
Pic. 20 Vertical mask
Masks are not available for LogMar Modified type chart, ETDRS
chart and Standard Snellen chart (in ‘Other Tests’). Instead there
is an option of underlining:
- a single optotype (with button)
- a line (with button)
WARNING !
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