Contrast sensitivity is an important measure of visual capabilities. The test complements a measure of visual acuity (which describes the finest detail visible at high contrast) by defining a subject’s ability to discern large targets at low contrast and is particularly useful in the examination of patients with reduced vision or visual impairment.
The size of each picture or letter remains constant throughout but the contrast of the outline of the targets reduces so that the targets become more difficult to discern against the grey background.
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Tel: 01843 293057