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 |
|---|


Only standardized format accepted in studies sponsored by the National Eye Institute.
Designed for use in clinical studies and low vision evaluations where accurate, repeatable visual acuity measurements are required.

Contrast sensitivity test comparable to the Small Letter Contrast Test.
Detects subtle effects of defocus, low luminance and glare.

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
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