Results 11 to 20 of about 1,210,014 (249)
Neural Mechanisms for Drosophila Contrast Vision [PDF]
Neuron, 2015 Spatial contrast, the difference in adjacent luminance values, provides information about objects, textures, and motion and supports diverse visual behaviors. Contrast computation is therefore an essential element of visual processing. The underlying mechanisms, however, are poorly understood.
Etienne Serbe +4 more
openaire +3 more sources
Relationship between Visual Dysfunction and Retinal Changes in Patients with Multiple Sclerosis. [PDF]
PLoS ONE, 2016 To evaluate structural changes in the retina and their correlation with visual dysfunction in patients with multiple sclerosis.Patients with multiple sclerosis (n = 84) and healthy controls (n = 84) underwent structural evaluation of the retinal nerve ...
Maria Satue +10 more
doaj +1 more source
The secret world of shrimps: polarisation vision at its best [PDF]
, 2008 Animal vision spans a great range of complexity, with systems evolving to detect variations in optical intensity, distribution, colour, and polarisation.
A Gafni +34 more
core +4 more sources
Binocular contrast vision at and above threshold [PDF]
Journal of Vision, 2006 A fundamental problem for any visual system with binocular overlap is the combination of information from the two eyes. Electrophysiology shows that binocular integration of luminance contrast occurs early in visual cortex, but a specific systems architecture has not been established for human vision.
Meese, Tim S. +2 more
openaire +5 more sources
Background chromatic contrast preference in cases with age-related macular degeneration
Journal of Optometry, 2013 Objective: To identify background chromatic contrast preferred subjectively by patients with age-related macular degeneration (AMD). Methods: Prospective observational case series. Study subjects with AMD were recruited and compared to a control group of
Mahmoud Alizadeh-Ebadi +2 more
doaj +1 more source
Spatial Contrast Sensitivity to Polarization and Luminance in Octopus
Frontiers in Physiology, 2020 While color vision is achieved by comparison of signals of photoreceptors tuned to different parts of light spectra, polarization vision is achieved by comparison of signals of photoreceptors tuned to different orientations of the electric field ...
Luis Nahmad-Rohen, Misha Vorobyev
doaj +1 more source
Revisiting spatial vision: toward a unifying model [PDF]
, 2000 We report contrast detection, contrast increment, contrast masking, orientation discrimination, and spatial frequency discrimination thresholds for spatially localized stimuli at 4° of eccentricity.
Braun, Jochen +2 more
core +2 more sources
Temporal structure in spiking patterns of ganglion cells defines perceptual thresholds in rodents with subretinal prosthesis. [PDF]
, 2018 Subretinal prostheses are designed to restore sight in patients blinded by retinal degeneration using electrical stimulation of the inner retinal neurons.
Goetz, Georges +8 more
core +3 more sources
Psychophysical aspects of contrast sensitivity
African Vision and Eye Health, 2013 This paper reviews the psychophysical aspects of contrast sensitivity which concerns components of visual stimuli and the behavioural responses and methods used in contrast sensitivity testing.
Anusha Y. Sukha, Alan Rubin
doaj +1 more source
Seeing the body distorts tactile size perception [PDF]
, 2013 Vision of the body modulates somatosensation, even when entirely non-informative about stimulation. For example, seeing the body increases tactile spatial acuity, but reduces acute pain.
Anema +29 more
core +1 more source