Very easy to hold and use for changing luminance and on/off.
Features:
- Hard keys for best tactile feel
- Uses 3 AAA batteries (included)
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Very easy to hold and use for changing luminance and on/off.
Very easy to hold and use for changing luminance and on/off.
Features:
Brands | Precision Vision |
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The charts come as a set of two panels (21x24inches, 53x60cm) each with a high contrast chart one side and a low contrast chart (18% Weber or 10% Michelson) on the other. The optotype set is the family of ten British Standard (1968) 5×4 non-serifed letters
Contrast sensitivity test comparable to the Small Letter Contrast Test.
Detects subtle effects of defocus, low luminance and glare.
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