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Installation, Features, & Functions
Remote Control Functions
MIN
Press the Contrast MIN button to decreases the contrast of the opto
character or the sine gratings in the contrast sensitivity mode.
Note: RED/GREEN tests will only display maximum contrast
Pressing the LIGHT button changes the illumination of the screen.
LIGHT
There are three light levels available for testing: full illumination (220
cd/m
(contrast sensitivity low light test 3 cd/m
Note: Unit should be illuminated for 10 minutes prior to photopic and
Pressing the CONT button activates the frequency grating, contrast
sensitivity mode. When in the CONT mode, the UP/DOWN arrows
adjust the frequency, the RIGHT/LEFT arrows rotate the image angle,
CONT
and the MIN/MAX buttons adjust the level of contrast. In this mode
the number in the upper right corner displays the frequency, and in
the lower left the contrast level by percentage. Pressing the CONT a
second time exits this mode.
Note: Contrast adjustment is only available in the ClearChart 4X.
Each button is labeled with a line size and when pressed, will display
SIZE
BUTTONS
SIZE
the current optotype at that size. Pressing the same button again will
100
randomize the optotype at that current size.
OPTO
Pressing the OPTO button will toggle through the different optotypes.
Note: Toggling through optotypes at large line sizes might prevent
ALT OPTO
Pressing the ALT OPTO button will display the alternate optotype
selected during the initial setup or in the Menu screen.
ANIM
Pressing the ANIM button will animate the current optotype. Press the
ANIM button a second time to stop the animation.
Pressing the MOVIE button will run an animated movie for pediatric
MOVIE
focusing. Use the UP/DOWN arrows to adjust the volume. Press the
MOVIE button a second time to exit the movie.
28
(continued)
letters even if less than maximum contrast is selected.
), photopic (contrast sensitivity standard, 85 cd/m
2
mesopic testing.
the viewing of the Allen Symbols.
), mesopic
2
).
2
(continued)
13795-101 Rev. J
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