Cumming BG, Parker AJ.
... et al., 1968), it has been widely assumed that these neurons may form the physiological substrate for stereopsis. To provide a critical evaluation of this hypothesis, it is essential to perform detailed comparisons between the psychophysical properties of stereopsis and the properties of disparity s ...
... et al., 1968), it has been widely assumed that these neurons may form the physiological substrate for stereopsis. To provide a critical evaluation of this hypothesis, it is essential to perform detailed comparisons between the psychophysical properties of stereopsis and the properties of disparity s ...
GLAUCOMA
... approximately 40 mm Hg at which level the likelihood of damage is significant. Visual fields are also not helpful in the early stages of diagnosis because a considerable number of neurons must be lost before VF changes can be detected. Optic nerve damage in the early stages is difficult or impossibl ...
... approximately 40 mm Hg at which level the likelihood of damage is significant. Visual fields are also not helpful in the early stages of diagnosis because a considerable number of neurons must be lost before VF changes can be detected. Optic nerve damage in the early stages is difficult or impossibl ...
The Role of Temporal Structure in Human Vision
... the visual scene is sufficient to portray contours specified by these spatial discontinuities. As pointed out above, however, our visual world is highly dynamic: objects move within the visual scene, and observers themselves are chronically moving their eyes and heads as they view objects. Consequen ...
... the visual scene is sufficient to portray contours specified by these spatial discontinuities. As pointed out above, however, our visual world is highly dynamic: objects move within the visual scene, and observers themselves are chronically moving their eyes and heads as they view objects. Consequen ...
Neuro-Opthalmology (Developments in Ophthalmology, Vol. 40)
... Control Theory have been proven to be very beneficial, and often deficits can only be correctly interpreted by the use of such models [see the chapter by Glasauer]. The latter also allow predictions and can provide the basis for new surgical procedures and other interventions. In order to test the m ...
... Control Theory have been proven to be very beneficial, and often deficits can only be correctly interpreted by the use of such models [see the chapter by Glasauer]. The latter also allow predictions and can provide the basis for new surgical procedures and other interventions. In order to test the m ...
Sensors for impossible stimuli may solve the stereo correspondence
... in the arrangement of their ON and OFF regions, but not in retinal position, and position disparity (Fig. 1b), in which left and right-eye receptive fields differ in their position on the retina, but not in their profile2. Several recent studies in V13–6 have concluded that most disparity-selective ...
... in the arrangement of their ON and OFF regions, but not in retinal position, and position disparity (Fig. 1b), in which left and right-eye receptive fields differ in their position on the retina, but not in their profile2. Several recent studies in V13–6 have concluded that most disparity-selective ...
MOLECULAR MECHANISMS OF SYNAPTIC PLASTICITY IN ADULT MAMMALIAN SENSORY CORTEX
... 1. He HY, Rasmusson DD, Quinlan EM. Progressive elevations in AMPA and GABAA receptor levels in deafferented somatosensory cortex. J Neurochem. 2004 Sep;90(5):1186-93. Restricted receptive fields (RFs), a hallmark of mature sensory systems, are actively maintained by a balance between ascending exci ...
... 1. He HY, Rasmusson DD, Quinlan EM. Progressive elevations in AMPA and GABAA receptor levels in deafferented somatosensory cortex. J Neurochem. 2004 Sep;90(5):1186-93. Restricted receptive fields (RFs), a hallmark of mature sensory systems, are actively maintained by a balance between ascending exci ...
The transference of benefits between the eyes Does
... measure of degrees. Amplitude also conveys information about the size or magnitude of the saccadic eye movement (Jóhannesson, 2014). The velocity of saccades is an important characteristic of them and the peak velocity of a 20° saccade can reach more than 450°/second (Leigh & Zee, 2015). There is an ...
... measure of degrees. Amplitude also conveys information about the size or magnitude of the saccadic eye movement (Jóhannesson, 2014). The velocity of saccades is an important characteristic of them and the peak velocity of a 20° saccade can reach more than 450°/second (Leigh & Zee, 2015). There is an ...
No Slide Title
... The general problem: associate N-dimensional space curves with object affordances A special case: The recognition of two (or three) dimensional trajectories in physical space Simplest solution: Map temporal information into spatial domain. Then apply known pattern recognition techniques. Problem wit ...
... The general problem: associate N-dimensional space curves with object affordances A special case: The recognition of two (or three) dimensional trajectories in physical space Simplest solution: Map temporal information into spatial domain. Then apply known pattern recognition techniques. Problem wit ...
the properties and neural substrate of eye movements
... movements require both velocity-coded and position-coded changes in innervation, all conjugate eye movement commands need access to a common neural integrator. Experimental lesions of structures vital for neural integration affect all classes of conjugate eye movements.2,13 Furthermore, it appears t ...
... movements require both velocity-coded and position-coded changes in innervation, all conjugate eye movement commands need access to a common neural integrator. Experimental lesions of structures vital for neural integration affect all classes of conjugate eye movements.2,13 Furthermore, it appears t ...
18
... How does the human brain make sense of the 3D world while its visual input, the retinal images, are only two-dimensional? There are multiple depth-cues exploited by the brain to create a 3D model of the world. Despite the importance of this subject both for scientists and engineers, the underlying c ...
... How does the human brain make sense of the 3D world while its visual input, the retinal images, are only two-dimensional? There are multiple depth-cues exploited by the brain to create a 3D model of the world. Despite the importance of this subject both for scientists and engineers, the underlying c ...
Plasticity of Binocularity and Visual Acuity Are Differentially Limited
... frequency, it was briefly retrained at half that spatial frequency to eliminate any potential “side bias.” Then, testing resumed at the spatial frequency below the original failure. The threshold for visual acuity was established once a mouse exhibited a consistent pattern of performance. Acuity thr ...
... frequency, it was briefly retrained at half that spatial frequency to eliminate any potential “side bias.” Then, testing resumed at the spatial frequency below the original failure. The threshold for visual acuity was established once a mouse exhibited a consistent pattern of performance. Acuity thr ...
Anatomical origins of ocular dominance in mouse primary visual cortex
... Section Editor: Sensory Systems = Dr. Richard Weinberg; or Neuroanatomy = Dr. Charles R. Gerfen Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manusc ...
... Section Editor: Sensory Systems = Dr. Richard Weinberg; or Neuroanatomy = Dr. Charles R. Gerfen Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manusc ...
Viktor`s Notes * Optic Nerve and Visual Pathways Disorders
... a) restored vision but not return to full normal! (frequent residual deficits in color vision, contrast sensitivity, light brightness sense, stereopsis; Uhthoff symptom*; visually evoked potential latency almost always remains prolonged). b) postneuritic optic atrophy with varying degrees of vision ...
... a) restored vision but not return to full normal! (frequent residual deficits in color vision, contrast sensitivity, light brightness sense, stereopsis; Uhthoff symptom*; visually evoked potential latency almost always remains prolonged). b) postneuritic optic atrophy with varying degrees of vision ...
the Report - The Lasker Foundation
... Practically speaking, this means that visual acuity is reduced despite a normal structural eye examination due to the presence of at least one amblyopia risk factor early in life. These risk factors include deprivation (induced by congenital cataract or ptosis, for example), manifest strabismus of ...
... Practically speaking, this means that visual acuity is reduced despite a normal structural eye examination due to the presence of at least one amblyopia risk factor early in life. These risk factors include deprivation (induced by congenital cataract or ptosis, for example), manifest strabismus of ...
Fact Sheet GLAUCOMA
... Can Glaucoma Occur in a Very Young Child? There is more than one name for congenital glaucoma. It might also be called childhood glaucoma / pediatric or infantile glaucoma because it occurs in babies and young children. Congenital glaucoma is usually diagnosed within the first year of life. ...
... Can Glaucoma Occur in a Very Young Child? There is more than one name for congenital glaucoma. It might also be called childhood glaucoma / pediatric or infantile glaucoma because it occurs in babies and young children. Congenital glaucoma is usually diagnosed within the first year of life. ...
Visual Fields
... Although there are many ways to measure visual field function, we will concentrate our efforts from this point forward on automated perimetry because of its widespread use in “Visual Fields” 2 ...
... Although there are many ways to measure visual field function, we will concentrate our efforts from this point forward on automated perimetry because of its widespread use in “Visual Fields” 2 ...
Effects of Early Monocular Deprivation on Visual
... of Physiology, University of Virginia School of Medicine, CharZottesviEEe, Virginia Z.WOI ...
... of Physiology, University of Virginia School of Medicine, CharZottesviEEe, Virginia Z.WOI ...
click here for PDF
... In skilled readers the decision when to move the eyes during reading appears to be related to high level factors such as the lexical and syntactic complexity of the text, and regressions are usually a response to comprehension failure (Kennedy et al, 2003). The decision where to move the eyes seems ...
... In skilled readers the decision when to move the eyes during reading appears to be related to high level factors such as the lexical and syntactic complexity of the text, and regressions are usually a response to comprehension failure (Kennedy et al, 2003). The decision where to move the eyes seems ...
Stereoscopic Mechanisms in Monkey Visual Cortex: Binocular
... screen different from each other, either by using 2 independent random-dot sequences or by switching the pattern on one screen to be the complement of the pattern on the other screen. The stereofields shown in this figure illustrate this latter condition, with the test area outlined for emphasis by ...
... screen different from each other, either by using 2 independent random-dot sequences or by switching the pattern on one screen to be the complement of the pattern on the other screen. The stereofields shown in this figure illustrate this latter condition, with the test area outlined for emphasis by ...
Vision in Drosophila - University of Queensland
... anatomy, and behavior—by studying mutants, for example, in which all was held constant except for a mutation in one gene. To adequately dissect vision, the natural world in all its complexity was often put aside while differentiable components of vision, such as color or motion, were tackled separat ...
... anatomy, and behavior—by studying mutants, for example, in which all was held constant except for a mutation in one gene. To adequately dissect vision, the natural world in all its complexity was often put aside while differentiable components of vision, such as color or motion, were tackled separat ...
The Physiology of the Senses
... When an object moves, its image can be kept still on the fovea by means of a pursuit eye movement (e.g. when tracking a moving ball or your finger). Watch while your friend tracks your finger as it moves slowly back and forth. Now ask your friend to try making a pursuit movement without a moving tar ...
... When an object moves, its image can be kept still on the fovea by means of a pursuit eye movement (e.g. when tracking a moving ball or your finger). Watch while your friend tracks your finger as it moves slowly back and forth. Now ask your friend to try making a pursuit movement without a moving tar ...
Tsutsui (2004) Neural mechanisms of three
... We can see things in three dimensions because the visual system re-constructs the three-dimensional (3D) configurations of objects from their two-dimensional (2D) images projected onto the retinas. The purpose of this paper is to give an overview of the psychological background and recent physiologi ...
... We can see things in three dimensions because the visual system re-constructs the three-dimensional (3D) configurations of objects from their two-dimensional (2D) images projected onto the retinas. The purpose of this paper is to give an overview of the psychological background and recent physiologi ...
Is In-out asymmetry diagnostic of visual crowding? Ramakrishna
... (Kleiner, Brainard, & Pelli, 2007) and presented on CRT monitors in a darkened room. Stimuli will be 9 black letters in the Sloan font (D, H, K, N, O, R, S, V and Z) presented on a grey background. The letter C is omitted since C and O are much less discriminable than other pairs in the Sloan font ( ...
... (Kleiner, Brainard, & Pelli, 2007) and presented on CRT monitors in a darkened room. Stimuli will be 9 black letters in the Sloan font (D, H, K, N, O, R, S, V and Z) presented on a grey background. The letter C is omitted since C and O are much less discriminable than other pairs in the Sloan font ( ...
Beyond the classical receptive field: The effect of contextual stimuli
... interior to the outer edge of the scotoma and in this way provide filling-in of the void. Large RFs are advantageous to this task. In higher visual areas, such as the middle temporal and inferotemporal lobe, RFs increase in size and lose most of their retinotopic organization while encoding increasi ...
... interior to the outer edge of the scotoma and in this way provide filling-in of the void. Large RFs are advantageous to this task. In higher visual areas, such as the middle temporal and inferotemporal lobe, RFs increase in size and lose most of their retinotopic organization while encoding increasi ...
ART 2015 AdvAnced ReTinAl TheRApy
... it is a great privilege to have you with us at the 12th conference of advanced retinal teaching (ART) 2015. The clear focus of these annual get-togethers is to present, discuss and understand novel and relevant perspectives in the field of retina with the potential to induce paradigm shifts. This in ...
... it is a great privilege to have you with us at the 12th conference of advanced retinal teaching (ART) 2015. The clear focus of these annual get-togethers is to present, discuss and understand novel and relevant perspectives in the field of retina with the potential to induce paradigm shifts. This in ...
Stereopsis recovery
Stereopsis recovery, also recovery from stereoblindness, is the phenomenon of a stereoblind person gaining partial or full ability of stereo vision (stereopsis).It has long been established state of the art that the therapeutic treatment of stereoblind patients should aim at recovering stereo vision as far as possible in very young children, as well as in patients who had acquired but lost their ability for stereopsis due to a medical condition. In contrast, this aim has normally not been present in the treatment of those who missed out on learning stereopsis during their first few years of life. In fact, the acquisition of binocular and stereo vision was long thought to be impossible unless the person acquired this skill during a critical period in infancy and early childhood. This hypothesis normally went unquestioned and has formed the basis for the therapeutic approaches to binocular disorders for decades. It has been put in doubt in recent years. In particular since studies on stereopsis recovery began to appear in scientific journals and it became publicly known that neuroscientist Susan R. Barry achieved stereopsis well into adulthood, that assumption is in retrospect considered to have held the status of a scientific dogma.Very recently, there has been a rise in scientific investigations into stereopsis recovery in adults and youths who have had no stereo vision before. While it has now been shown that an adult may gain stereopsis, it is currently not yet possible to predict how likely a stereoblind person is to do so, nor is there general agreement on the best therapeutic procedure. Also the possible implications for the treatment of children with infantile esotropia are still under study.