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%
10003.000.0010.1
1002.000.011
201.300.055
10.001.000.110
5.000.700.220
3.330.520.330
2.500.400.440
2.000.300.550
1.670.220.660
1.430.150.770
1.250.100.880
1.110.050.990
1.000.001100
References in periodicals archive ?
VectorVision[R] specializes in the standardization of contrast sensitivity, glare sensitivity, low contrast acuity, and ETDRS acuity vision testing.
Furthermore, contrast sensitivity was significantly increased at three months and remained improved at the end of the six-month study.
In their pilot study investigating factors affecting contrast sensitivity levels in individuals with refractive errors less than 1 diopter, Karatepe et al.
Recent studies show significant improvements in intermediate vision and contrast sensitivity with high rates of patient satisfaction and reduced complaints of photic phenomena.
The contrast sensitivity assessment should also take into account the size of the object perceived because this varies depending on whether the object is small (glasses) or large (a car).
The contrast experiment was notable because they found that the stimulation only improved contrast sensitivity at frequencies also associated with visual acuity, indicating that it was just the subjects' visual acuity that was being affected, not the contrast sensitivity.
In addition to the sinusoidal fade pattern, the display aperture may be further hidden especially if high luminance white graphics are place near the border to lower the contrast sensitivity of the eye as shown in Figure 18.
The contrast sensitivity characteristic is determined as a measure of the limit of visibility for low-contrast patterns.
Since one of the responsibilities of every athlete is to discern visual distinctions in different illumination conditions, it is necessary to examine their contrast sensitivity (19).
Thus, the contrast sensitivity function (CSF) represents the CS for a set of spatial frequency bands low, medium and high (De Valois & De Valois, 1988).
The major concern with use of these lenses are loss of contrast sensitivity and the inducement of glare and halos from light sources during night vision.
The 15-patient, open-label, Phase 1/2 trial study used best-corrected visual acuity (BCVA), contrast sensitivity (CS), microperimetry for analysis of visual function, optical coherence tomography (OCT), and fundus autofluorescence (FAF) to measure the extent of the underlying geographic atrophy.