Variability in parafoveal cone mosaic in normal trichromatic individuals
نویسندگان
چکیده
منابع مشابه
Variability in parafoveal cone mosaic in normal trichromatic individuals
Parafoveal function is important for daily visual tasks such as reading. Here the variability in cone density along the four cardinal meridians in parafoveal regions of the retina was investigated in vivo using an adaptive optics fundus camera. Ten healthy normal trichromatic individuals were included in the study. There were significant differences in cone density between individuals at all fo...
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Using high-resolution adaptive-optics imaging combined with retinal densitometry, we characterized the arrangement of short- (S), middle- (M), and long- (L) wavelength-sensitive cones in eight human foveal mosaics. As suggested by previous studies, we found males with normal color vision that varied in the ratio of L to M cones (from 1.1:1 to 16.5:1). We also found a protan carrier with an even...
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Observers use a wide range of color names, including white, to describe monochromatic flashes with a retinal size comparable to that of a single cone. We model such data as a consequence of information loss arising from trichromatic sampling. The model starts with the simulated responses of the individual L, M, and S cones actually present in the cone mosaic and uses these to reconstruct the L-...
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A new Colour Assessment and Diagnosis (CAD) test has been developed and optimised to measure small changes in chromatic sensitivity. In addition the test quantifies the severity of redgreen and yellow-blue loss and classifies accurately even minimal congenital deficiencies. The technique employed makes use of dynamic luminance contrast (LC) noise to mask the detection of any residual LC signals...
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Cones with peak sensitivity to light at long (L), medium (M) and short (S) wavelengths are unequal in number on the human retina: S cones are rare (<10%) while increasing in fraction from center to periphery, and the L/M cone proportions are highly variable between individuals. What optical properties of the eye, and statistical properties of natural scenes, might drive this organization? We fo...
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ژورنال
عنوان ژورنال: Biomedical Optics Express
سال: 2011
ISSN: 2156-7085,2156-7085
DOI: 10.1364/boe.2.001351