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Neuropsin-expressing cells in the retina affect melanopsin expression and response to light in mice. [PDF]

Sci Rep
Calligaro H, Khov B, Kim KY, Le H, Ellisman M, Panda S.   +5 more
europepmc   +1 more source

Melanopsin-mediated signals in natural and human-made environments

Barrionuevo PA, Barrancas FD.
europepmc   +1 more source

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Photopigments and pseudo-pigments

Vision Research, 1977
Abstract The spectral properties of photopigments are often inferred from physiological measures of spectral sensitivity. From these measures pigments have recently been inferred with properties not corresponding to those of any pigment measured by spectrophotometry.
L, Sirovich, I, Abramov
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Mapping cone photopigment optical density

Journal of the Optical Society of America A, 1993
The distribution of cone photopigment across the retina affects the amount of light captured by cones at each retinal location. Cone photopigment optical density is measured in two ways, with reflectometry and/or with color matching. Color matching measures a higher optical density than does reflectometry.
A E, Elsner, S A, Burns, R H, Webb
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Photopigments in Central Serous Chorioretinopathy

American Journal of Ophthalmology, 2011
To investigate functional abnormalities in eyes with central serous chorioretinopathy (CSC).Observational case series.Sixteen eyes with CSC were enrolled. Autofluorescence densitometry was performed to measure the optical density of the photopigments. Serial fundus autofluorescence (FAF) images were obtained by Heidelberg Retina Angiogram 2.
Akira, Ojima, Tomohiro, Iida, Tetsuju, Sekiryu, Ichiro, Maruko, Yukinori, Sugano   +4 more
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Aging and human cone photopigments

Annual Meeting Optical Society of America, 1986
Previous studies1,2 have disagreed about the effects of aging on human cone optical densities. We have examined the question of whether there are age-related changes in the density and half-bleach illuminance of normal observers. We used a color-matching method to measure the optical density of the photopigments within cones.
A E, Elsner, L, Berk, S A, Burns, P R, Rosenberg   +3 more
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Photopigments and circadian systems of vertebrates

Biophysical Chemistry, 1995
In the retinal degeneration (rd) mouse the absence of rod cells and the progressive loss of cones does not result in a decrease in circadian phase shifting responses to light. By contrast, rd/rd mice are unable to perform simple visual tasks. In addition, rodless transgenic mice, and mice homozygous for the retinal degeneration slow (rds) mutation ...
S M, Argamaso, A C, Froehlich, M A, McCall, E, Nevo, I, Provencio, R G, Foster   +5 more
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Vitamin A deprivation and Drosophila photopigments

Nature, 1977
VITAMIN A deprivation causes a profound reduction in visual sensitivity and photopigment concentration in the eyes of both vertebrates and invertebrates1,2. In vertebrates vitamin A deprivation results in degeneration of photoreceptor cells3 and decreases the number of intramembrane particles visualised in the disks of rod outer segments by freeze ...
W A, Harris, D F, Ready, E D, Lipson, A J, Hudspeth, W S, Stark   +4 more
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Foveal Photopigments

Optometry and Vision Science, 1992
The relative rates of absorption of quanta per unit of energy for the various wavelengths can be assessed for the human red, green, and blue photoreceptors by assuming that the responses generated by a photoreceptor are proportional to the rate of absorption of quanta.
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Individual differences in photopigments

Annual Meeting Optical Society of America, 1986
Variations in color vision have long been understood as reflecting variations in the photopigment complement. Beyond those photopigment variations that account for the differences between the classical color vision phenotypes, there are several lines of evidence to suggest further variation in the spectral positioning of photopigments found in ...
Jay Neitz, Gerald H. Jacobs
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