Eye Chart Lighting for Consistency?
If the goal is consistent test results and controlling for distance is a given, then would a backlight in a dark/darkened room guarantee the most consistent results?
Is there any other way to control for consistent light conditions when moving eye-test equipment from room to room?
Would a screen produce consistent results as well, as long as letter size was controlled?
The goal, obviously, is measuring visual acuity accurately.
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