Chart(Distance): ESV1200™ and ESV1500™ - LEA NUMBERS® Low Contrast - (10ft/3m)

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A low contrast test is a special way to measure how well eyes function in low light situations and/or are able to distinguish objects from similarly colored or shaded backgrounds. Testing is identical to the measurement of visual acuity at high contrast levels. The 2.5% test is the most practical test in clinical use. These charts can either be wall mounted or used in an ESV1200™, ESV1500™, or a Model A+ illuminated cabinet. Available in 5 Contrast levels: 1.25%, 2.5%, 5%, 10%, and 25%. The line sizes on these charts range from 10/63 to 10/4 (3/19 to 3/1.2).The other equivalents featured on these chart are letter size, 20 foot, 6 meter, decimal, and LogMAR. Includes recording forms and instructions. Show more