Results 211 to 220 of about 7,150 (250)

Monoclonal antibody-recognizing cone visual pigment

Experimental Eye Research, 1986
Monoclonal antibodies were raised to a crude photoreceptor-membrane suspension from chicken retinas. Clones producing antibodies against cone outer segments were selected by screening with immunocytochemistry on semithin sections of the retina. One monoclonal antibody, called COS-1, specifically labelled outer segments of double cones and one type of ...
A Szel, L Takacs, Eva Monostori
exaly   +3 more sources

Bilateral Symmetry of Visual Function Loss in Cone–Rod Dystrophies

, 2016
PURPOSE: To investigate bilateral symmetry of visual impairment in cone-rod dystrophy (CRD) patients and understand the feasibility of clinical trial designs treating one eye and using the untreated eye as an internal control.
Benedetto Falsini, Marco Piccardi, Lucia Ziccardi   +2 more
exaly   +3 more sources

Visual acuity changes in cone and cone‐rod dystrophies

Ophthalmic and Physiological Optics, 2011
Citation information: Prokofyeva E, Troeger E, Bernd A & Zrenner E. Visual acuity changes in cone and cone‐rod dystrophies. Ophthalmic Physiol Opt 2011. doi: 10.1111/j.1475‐1313.2011.00883.x
Prokofyeva, Elena, Troeger, Eric, Bernd, Antje, Zrenner, Eberhart   +3 more
openaire   +4 more sources

Cone visual pigments of aquatic mammals

Visual Neuroscience, 2005
It has long been hypothesized that the visual systems of animals are evolutionarily adapted to their visual environment. The entrance many millions of years ago of mammals into the sea gave these new aquatic mammals completely novel visual surroundings with respect to light availability and predominant wavelengths.
Lucy A, Newman, Phyllis R, Robinson
openaire   +2 more sources

Visual Pigments of Single Primate Cones

Science, 1964
Single parafoveal cones from human and monkey retinas were examined in a recording microspectrophotometer. Three types of receptors with maximum absorption in the yellow, green, and violet regions of the spectrum were found. Thus the commonly held belief, for which there has previously been no direct and unequivocal evidence, that color vision is ...
W B, MARKS, W H, DOBELLE, E F, MACNICHOL
openaire   +2 more sources

The cone photoreceptors and visual pigments of chameleons

Journal of Comparative Physiology A, 2005
Visual pigments, oil droplets and photoreceptor types in the retinas of four species of true chameleons have been examined by microspectrophotometry. The species occupy different photic environments: two species of Chamaeleo are from Madagascar and two species of Furcifer are from Africa and the Arabian Peninsula.
James K, Bowmaker, Ellis R, Loew, Matthias, Ott   +2 more
openaire   +2 more sources

Cone spacing and the visual resolution limit

Journal of the Optical Society of America A, 1987
It is commonly assumed that the visual resolution limit must be equal to or less than the Nyquist frequency of the cone mosaic. However, under some conditions, observers can see fine patterns at the correct orientation when viewing interference fringes with spatial frequencies that are as much as about 1.5 times higher than the nominal Nyquist ...
D R, Williams, N J, Coletta
openaire   +2 more sources

The Visual Cycle of the Cone Photoreceptors of the Retina

Nutrition Reviews, 2004
The photoreceptors of the eye's retina consist of rods and cones; rods serve vision in dim light, whereas cones serve high-resolution color vision in daylight. The first event in vision is the light-initiated isomerization of 11-cis-retinal, which is attached to rod or cone opsin, to all-trans-retinal.
openaire   +3 more sources

Rod and cone visual pigments in the goldfish

Vision Research, 1981
Abstract This microspectrophotometric (MSP) study has confirmed that goldfish, acclimated under a certain light and temperature regimen, possess mixtures of porphyropsin and rhodopsin in their rod outer segments. Moreover, the MSP spectra from the red, green and blue cones of these acclimated goldfish also shifted to shorter wavelengths from spectra ...
A T, Tsin, P A, Liebman, D D, Beatty, R, Drzymala   +3 more
openaire   +2 more sources

A visual nonlinearity fed by single cones

Vision Research, 1992
An intensive nonlinearity in the visual system can produce distortion products, or difference frequency gratings, when observers view two high contrast, high spatial frequency interference fringes of slightly different frequency or orientation added together at the retina.
D I, MacLeod, D R, Williams, W, Makous
openaire   +2 more sources