contrast sensitivity

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 sensitivity	log₁₀ contrast sensitivity	decimal	%
1000	3.00	0.001	0.1
100	2.00	0.01	1
20	1.30	0.05	5
10.00	1.00	0.1	10
5.00	0.70	0.2	20
3.33	0.52	0.3	30
2.50	0.40	0.4	40
2.00	0.30	0.5	50
1.67	0.22	0.6	60
1.43	0.15	0.7	70
1.25	0.10	0.8	80
1.11	0.05	0.9	90
1.00	0.00	1	100

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acuity
Cataracts
chart
contrast
Eye Examination
Fourier analysis
function
glare
grating
limen
monocular diplopia
optic atrophy
optic neuritis
spatial frequency
spurious resolution
test
threshold
vision
Vistech

Contrast sensitivity, however, improved in both the 6-mg and especially the 12-mg lutein group, and many of these measurements were significant.

Lutein may improve vision by Ninger, Laura J. / Life Extension

5), as well as individuals with a distance visual acuity of more than 20/40 but who had near visual acuity at least two logarithm steps lower or whose contrast sensitivity was impaired, were advised to set up an appointment with an ophthalmologist.

Prevalence of visual impairments in adults with cognitive and ... by Henriksen, Anne; Degenhardt, Sven / Journal of Visual Impairment & Blindness

Normally, improving contrast sensitivity means getting glasses or eye surgery-somehow changing the optics of the eye," Nature quoted Bavelier as saying.

Action-packed video games are good for eyes by Asian News International

contractured muscle

Contractures

contradictory modality