contrast sensitivity

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con·trast sen·si·tiv·i·ty

in optics, the ability to discern the difference in brightness of adjacent areas; in radiology, allergic reaction to iodinated radiographic contrast medium.

contrast sensitivity

The ability to distinguish objects from the background in which they are located. It is a critical component of functionally adequate vision.

sensitivity, contrast 

The ability to detect luminance contrast. In psychophysical terms it is the reciprocal of the minimum perceptible contrast. The measurement of the contrast sensitivity of the eye is a more complete assessment of vision than standard visual acuity measurement. It provides an evaluation of the detection of objects (usually sinusoidal gratings) of varying spatial frequencies and of variable contrast and thus obtaining a contrast sensitivity function (CSF). Example: following amblyopia treatment, some cases still have the same visual acuity while the CSF is improved. See contrast sensitivity chart; contrast sensitivity function; spurious resolution; Arden grating test; Vistech.
Table S1 Relationship between contrast sensitivity and contrast threshold (contrast sensitivity = 1/contrast threshold). Neither values have units
contrast threshold
contrast sensitivitylog10 contrast sensitivitydecimal%
References in periodicals archive ?
The correlations of neuroticism with near visual acuity, distance visual acuity, and contrast sensitivity were all not significant ([less than or equal to] 0.
Considering the important effect of various colors of sunglasses on visual performance, this study was aimed to evaluate the effect of different colors of sun glasses on visual acuity, contrast sensitivity, stereopsis and color vision.
The matter of contrast sensitivity changes through normal aging has been the object of psychophysical research for decades now.
Low vision often causes decreased contrast sensitivity as well as reduced resolution, making it more difficult to see low-contrast images on SVD devices.
Contrast sensitivity was tested, when possible, with the SZB-LCS-Test using Landolt rings.
2002) reported significantly lower visual contrast sensitivity (VCS) in apartment residents exposed to tetrachloroethylene (perchloroethylene, or perc) compared to unexposed "matched" control subjects.
The new lens offers an enhanced aspheric optic that improves image quality and increases contrast sensitivity in cataract surgery patients with astigmatism.
We start by measuring each athlete's visual acuity, eye-hand coordination, contrast sensitivity and reaction time to assess how well an athlete sees and then provide a game plan to address areas of improvement.
AOP vice-president David Whitaker (pictured), from the University of Bradford, for 'Evaluation of a simple test for measuring contrast sensitivity and glare'
To assess the contrast sensitivity of the eye, sinusoidal luminance tests patterns are used, and contrast is defined by the amplitude of the sinusoidal variation divided by the average luminance--the modulation.
7)--but had little effect on four others: symbol digit latency, vibrotactile threshold, visual contrast sensitivity, and grip strength.
The lens also showed significantly less incidence of moderate to severe halos and glare, and better quality of vision as measured by contrast sensitivity.