The Difference Between Glare And Contrast Sensitivity
Because glare is often used in testing contrast sensitivity, there may be some confusion about the difference between the two. While glare is luminance in the visual field that is greater than the ambient illuminance, resulting in compromised visual performance, contrast sensitivity refers to the ability of the visual system to differentiate various shades of gray, or variations in reflected luminance. Glare and contrast are intimately related; when glare is present, contrast sensitivity will be compromised.
- Contrast sensitivity tests measure the amount of contrast necessary to recognize a target with various gradations of reflected visual luminance
- Glare sensitivity tests measure the change in visual function that results from a glare source in another part of the field of vision
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