Notations in M letter sizes ranging from 20M to 1.6M for testing at various distances.
Contrast varies by page: full contrast, 25% , 10%, 5%, 2.5%, 1.25%, and .06%
Spiral bound
Test includes a soft-tipped pointer, 1 mater cord, recording forms (CAT. NO. 2514) and instructions
Measures 36 X 36cm (14.25 X 14.25 in.)
Traditional Sloan Optotypes
Uses different optotype combinations for each level to prevent undesired memorization
This contrast sensitivity flip book includes a series of seven contrast levels for accurate and precise vision testing. This levels decrease throughout the test beginning with acuity, 25%, 10%, 5%, 2.5%, 1.25% and ending with .06%. The use of several contrast levels help to accurately record the patients contrast sensitivity. Each test book includes instructions, recording forms and a soft tip pointer for accurate, easy and quick testing. All contrast levels are calibrated for testing and provide accurate, reliable, and repeatable results. Great for clinical studies or research.
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