contrast sensitivity


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contrast sensitivity

[′kän‚trast sen·sə′tiv·əd·ē]

contrast sensitivity

The ability to detect the presence of differences in luminance; the reciprocal of the contrast threshold.
References in periodicals archive ?
It also boosted contrast sensitivity, which helps people see better in poor light, especially at night.
New Xineos-2329 detector combines high resolution, high X-ray absorption and contrast sensitivity to support both Digital Breast Tomosynthesis (DBT) and Flat Field Digital Mammography (FFDM)
Because contrast sensitivity is a basic visual process involved in color perception, Thorstenson and co-authors Adam Pazda and Andrew Elliot wondered whether there might be a specific link between sadness and our ability to perceive color.
Peek provides users with a variety of diagnostic tests including visual acuity, visual field, colour vision, contrast sensitivity, lens imaging for cataract, retinal imaging and image grading.
Additionally, MacuHealth has been shown to improve macular pigment and contrast sensitivity in subjects in just six months.
Existing diagnosis techniques detect nAMD only once there is noticeable structural damage to the eye but this study hopes to diagnose the condition at an earlier stage, using colour contrast sensitivity testing that can spot slight changes in cells of the inner eye.
Best-corrected vision (with current spectacles) was assessed using the Lighthouse Ferris-Bailey Early Treatment Diabetic Retinopathy Study chart to measure visual acuity and the Pelli-Robson Contrast Sensitivity chart to measure contrast sensitivity.
Another longstanding problem of exposure to the sun is dazzle caused by intensive light which can decrease the visual performance, such as contrast sensitivity [5], and can be cured using black glasses.
A person with impaired vision due to diabetic retinopathy may see dark spots or have restricted side vision due to decreased contrast sensitivity.
The objective of the present study was to answer these questions by measuring contrast sensitivity for stimuli where the contrast modulation has different characteristics.
Thus, the Barten SQRI is calculated based on measurable properties of the visual displays and the contrast sensitivity function (CSF) of the person.
The functional vision evaluations consisted of structured observations of visual attention (in daylight and in a darkened room), visual motor functions (fixation, tracking movement, and convergence), color and shape perception, distance and near visual acuity, magnification needs, binocular vision, contrast sensitivity, glare sensitivity, and visual field (Arntzen Andrew, Groben, Henriksen, 2006).