Try searching the www or use Google Scholar with keywords like " flicker fusion frequency " or " temporal contrast sensitivity function . "-- Wjbeaty 02 : 37, 17 January 2007 ( UTC)
42.
In 2014, McMahon, along with Chad Jackson, Megan Capozzi, and Heng Dai, found that mice exposed to short, winter-like, light cycles showed enduring deficits in photopic retinal light responses and visual contrast sensitivity.
43.
Decreased contrast sensitivity arises from multiple etiologies, including retinal disorders such as Age-Related Macular Degeneration ( ARMD ), amblyopia, lens abnormalities, such as cataract, and by higher-order neural dysfunction, including stroke and Alzheimer's disease.
44.
A subsequent contrast sensitivity exam may demonstrate difficulty with decreased contrast ( using, e . g ., the Pelli-Robson chart, which consists of uniform-sized but increasingly pale grey letters on a white background ).
45.
At higher spatial frequencies, comprising finer and finer lines, contrast sensitivity decreases, until at about 40 cycles per degree even the brightest of bright lines and the darkest of dark lines cannot be seen.
46.
The study compared the K-D Contrast Sensitivity Chart to the retro-illuminated Sloan chart and found that the charts were comparable in both high and low contrast acuity testing ( 88 % high, 75 % low ).
47.
By using coarse gratings, the bright bands fall on the inhibitory as well as the excitatory region of the ganglion cell resulting in lateral inhibition and account for the low-frequency drop-off of the human contrast sensitivity function.
48.
Pelli is credited with over 60 publications and tools, many of which haveinfluential in the field of vision research, including : the Pelli-Robson Contrast Sensitivity Chart, the QUEST sequential estimation procedure, and the psychtoolbox ( a MATLAB extension ).
49.
Rather, Dr . Sheila West, professor of ophthalmology at Johns Hopkins Medical Institutions, reported that tests for contrast sensitivity _ the ability to distinguish, say, a step from the one below it _ are more revealing of functional disability in older people.
50.
That the wavelength discrimination and luminance contrast sensitivity measured in monkeys were very similar to those obtained for human observers, allowed De Valois to posit the relevance of his electrophysiological recordings in macaque monkeys to cortical processing in the early stages of the human visual system.
