26 May 1994 Testing functional vision: important relationships between grating contrast sensitivity and low-contrast letter acuity tests
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Abstract
Contrast sensitivity has emerged as an accepted, comprehensive tool which measures visual function. More capable than Snellen acuity, contrast sensitivity provides early detection of eye disease and the measurement of visual capability and performance-'2 Sine—wave gratings have been recognized as the gold standard for contrast sensitivity for over 29 years in the scientific, clinical and applied communities. Low contrast letter acuity has emerged the last 10 years as an alternative to gratings for contrast testing. The advantages and disadvantages of each approach to contrast testing have been discussed before.3 Here is offered a set of criteria and a methodology for evaluating any contrast test, whether composed of gratings, letters or any other target.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Arthur P. Ginsburg, "Testing functional vision: important relationships between grating contrast sensitivity and low-contrast letter acuity tests", Proc. SPIE 2127, Ophthalmic Lens Design and Fabrication II, (26 May 1994); doi: 10.1117/12.176836; https://doi.org/10.1117/12.176836
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