Tomey TCP-2000, Руководство пользователя

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Operation Manual
39
6. MASKS
The TCP-2000 Chart Panel allows you to select vertical, horizontal and single
optotype mask over selected chart of optotypes. Masks are available only for
optotype charts with more than one optotype and size 0.1 to 2.0 for all Snellen type
charts (Snellen, Snellen Modified, Snellen Contrast).
Masks can be used with optotype charts only.
Information that TCP-2000 is in the mask mode is continuously displayed in the
left bottom corner of screen. Depending which mask type you are using different
shapes are displayed:
• square – single mask
•
horizontal rectangle – horizontal mask
•
vertical rectangle – vertical mask
To switch off mask simply press button that corresponds to mask type you are
currently using or press any test button.
You can switch from one mask type to another without need of switching off
current mask.
6.1. Single mask
Allows you to select single mask over selected chart of optotypes.
1. Press to activate.
2. Use Arrows to move mask to the other optotype.
3. Press again to deactivate.
HINT !