Glial cell-mediated spread of retinal degeneration during detachment: a hypothesis based upon studies in rabbits.

abstract：:In two experiments we measured object recognition performance as a function of delay. In Experiment 1 we presented half of an image of an object, and then the other half after a variable delay. Objects were subdivided into top versus bottom halves, left versus right halves, or vertical strips. In Experiment 2 we separ...

journal_title：Vision research

authors： Servos P,Olds ES,Planetta PJ,Keith Humphrey G

更新日期：2005-06-01 00:00:00

abstract：:A static or counterphase (target) grating surrounded by drifting (inducer) gratings is perceived to move in the direction opposite that of the inducers. We compared the relative magnitudes of these simultaneous motion contrasts generated by both first-order and second-order stimuli. The first-order stimuli were sinuso...

journal_title：Vision research

authors： Nishida S,Edwards M,Sato T

更新日期：1997-01-01 00:00:00

abstract：:Increment-threshold spectral sensitivity functions were taken foveally and at four other retinal locations with different sized test stimuli. For the fovea and parafovea at 4 degrees, a 1 degree, 250 msec stimulus of variable wavelength, flashed on a 1000 td white background yielded spectral sensitivity curves with th...

journal_title：Vision research

authors： Kuyk TK

更新日期：1982-01-01 00:00:00

abstract：:Visual working memory is a system used to hold information actively in mind for a limited time. The number of items and the precision with which we can store information has limits that define its capacity. How much control do we have over the precision with which we store information when faced with these severe capa...

journal_title：Vision research

authors： Klyszejko Z,Rahmati M,Curtis CE

更新日期：2014-12-01 00:00:00

abstract：:The ability to rapidly and accurately recognize visual stimuli represents a significant computational challenge. Yet, despite such complexity, the primate brain manages this task effortlessly. How it does so remains largely a mystery. The study of visual perception and object recognition was once limited to investigat...

journal_title：Vision research

authors： Ungerleider LG,Bell AH

更新日期：2011-04-13 00:00:00

abstract：:This article describes a nonlinear model of neural processing in the vertebrate retina, comprising model photoreceptors, model push-pull bipolar cells, and model ganglion cells. Previous analyses and simulations have shown that with a choice of parameters that mimics beta cells, the model exhibits X-like linear spatia...

journal_title：Vision research

authors： Gaudiano P

更新日期：1994-07-01 00:00:00

abstract：:We have tested whether defocus imposed on local retinal areas can produce local changes in eye growth, even if accommodation is available to clear part of the imposed defocus. Hemi-field lenses were attached to little leather hoods that were worn by young chickens from day 11-15 post-hatching. The lens segments defocu...

journal_title：Vision research

authors： Diether S,Schaeffel F

更新日期：1997-03-01 00:00:00

abstract：:A subject with an unually large cortical scotoma, leaving a 9 degrees hemifield of vision in each eye, showed improvement with practice in pointing to an oscillating target positioned within the scotoma. The practice effect transferred to low-contrast targets and to stationary ones, though oscillating targets were alw...

journal_title：Vision research

authors： Bridgeman B,Staggs D

更新日期：1982-01-01 00:00:00

abstract：:Perception of directional motion was studied by displaying two images (F1 and F2) in rapid succession. The two images were identical except for a horizontal displacement of F2 with respect to F1. Observers reported the direction of horizontal motion over a wide range of displacements. The stimuli in Experiment 1 were ...

journal_title：Vision research

authors： Bischof WF,Di Lollo V

更新日期：1990-01-01 00:00:00

abstract：:Patients with retinitis pigmentosa (RP) show delayed inner retinal responses as measured by the cone ERG response to a 30 Hz stimulus. To determine the extent to which this delay results from abnormalities of cone phototransduction, cone ERGs to single flashes were obtained from 21 patients with RP and a model of cone...

journal_title：Vision research

authors： Hood DC,Birch DG

更新日期：1996-06-01 00:00:00

abstract：:Two-frame random-element kinematograms were used to study the matching algorithm employed by the visual system to keep track of moving elements. Previous data have shown that the maximum spatial displacement detectable (dmax) for random-dot kinematogram stimuli increases both with increasing dot size and with decreasi...

journal_title：Vision research

authors： Eagle RA,Rogers BJ

更新日期：1996-02-01 00:00:00

abstract：:Seven models of human visual recognition from cognitive psychology, visual psychophysics and connectionism were compared. They were used to predict psychophysical classification data obtained via supervised learning with parametrised grey-level patterns (compound Gabor signals). Four sets of learning patterns, as well...

journal_title：Vision research

authors： Unzicker A,Jüttner M,Rentschler I

更新日期：1998-08-01 00:00:00

abstract：:In his study of depth from monocular elements, Kaye (1978) [Kaye, M. (1978). Stereopsis without binocular correlation. Vision Research, 18(8), 1013-1022] reported that monocular stimuli, briefly presented to one eye in a stereoscopic display, generated reliable depth percepts. Here we replicate and extend Kaye's findi...

journal_title：Vision research

authors： Wilcox LM,Harris JM,McKee SP

更新日期：2007-08-01 00:00:00

abstract：:Responses to 400 msec flashes of white light were recorded at various depths in the retina of the intact macaque eye. A statistical technique, principal component analysis (PCA), was used to isolate independent components from the LERG, using the changing contribution of a cell's response to the LERG with retinal dept...

journal_title：Vision research

authors： Heynen H,van Norren D

更新日期：1985-01-01 00:00:00

abstract：:In this work, optical retardation (OR) was investigated in corneal stroma collagen fibers from nonobese diabetic (NOD) and healthy (BALB/c) mice. Linear dichroism (LD) was investigated in corneas stained with Ponceau SS and Toluidine Blue, using microspectrophotometer. NOD corneas showed higher OR values than the cont...

journal_title：Vision research

authors： Aldrovani M,Guaraldo AM,Vidal BC

更新日期：2007-12-01 00:00:00

abstract：:There is evidence that humans implicitly learn an average or prototype of previously studied faces, as the unseen face prototype is falsely recognized as having been learned (Solso & McCarthy, 1981). Here we investigated the extent and nature of face prototype formation where observers' memory was tested after they st...

journal_title：Vision research

authors： Or CC,Wilson HR

更新日期：2013-04-19 00:00:00

abstract：:Bisection is one of several spatial localization tasks that achieve hyperacuity performance levels. We find that optimal bisection thresholds, and hyperacuity tasks in general, are no better than might be expected from simple contrast detection and discrimination performance. The three-line bisection task can be descr...

journal_title：Vision research

authors： Carney T,Klein SA

更新日期：1999-02-01 00:00:00

abstract：:Adaptation-related aftereffects (AEs) have been found in the perception of face identity, in that perception of an ambiguous face is typically biased away from the identity of a preceding unambiguous adaptor face. In previous studies, we could show that both perceptual ambiguity and physical similarity play a role in ...

journal_title：Vision research

authors： Walther C,Schweinberger SR,Kovács G

更新日期：2014-07-01 00:00:00

abstract：:We recently found that the Rb protein is important for the regulation of retinal progenitor cell proliferation and rod photoreceptor development in the mouse retina. These two functions are separate for Rb and in this study we further characterize the role of Rb in retinal development. At postnatal day 12 in the retin...

journal_title：Vision research

authors： Donovan SL,Dyer MA

更新日期：2004-12-01 00:00:00

abstract：:A masking paradigm was employed to measure the spatial frequency selectivity of channels underlying human stereopsis. Observers viewed spatially filtered (0.4 octave bandwidth) random-dot stereograms in which a disparate bar appeared in either the top or bottom half of the display; superimposed on one RDS half-image w...

journal_title：Vision research

authors： Yang Y,Blake R

更新日期：1991-01-01 00:00:00

abstract：:The attentional mechanisms in the brain responsible for fast pop-out search and slower difficult search have been shown to interact. Even if pop-out search is interrupted, by the addition of extra distractors to an initially simple search display, the partial computations calculated by the mechanisms responsible for p...

journal_title：Vision research

authors： Olds ES,Punambolam RJ

更新日期：2002-03-01 00:00:00

abstract：:Adaptation to the simple visual displacement of prisms was compared to that for refractive lenses, which have a varied prismatic effect. Subjects were made myopic using contact lenses, then corrected using spectacle lenses. The effect on the perceived direction of a randomly located target was assessed from pointing b...

journal_title：Vision research

authors： Tuan KM,Jones R

更新日期：1997-07-01 00:00:00

abstract：:In this study, we show that negative polarity noise patterns appear to have a higher contrast than positive polarity noise patterns with identical expected Fourier amplitude spectra. This demonstrates a failure of contrast constancy over changes in pattern polarity. An examination of local contrast measures shows that...

journal_title：Vision research

authors： Benton CP,Johnston A

更新日期：1999-12-01 00:00:00

abstract：:Females heterozygous for congenital colour vision defects are of interest because they are believed to have cone photoreceptor ratios and cone photopigments that differ from normal. We describe a molecular genetic method to identify protan carriers that involves characterizing the genes that occur in the most upstream...

journal_title：Vision research

authors： Kainz PM,Neitz M,Neitz J

更新日期：1998-11-01 00:00:00

abstract：:Exogenous covert attention is an automatic, transient form of attention that can be triggered by sudden changes in the periphery. Here we test for the effects of attention on color perception. We used the methodology developed by Carrasco, Ling, and Read [Carrasco, M., Ling, S., & Read, S. (2004). Attention alters app...

journal_title：Vision research

authors： Fuller S,Carrasco M

更新日期：2006-11-01 00:00:00

abstract：:In previous eye movement research on word length effects, spatial width has been confounded with the number of letters. McDonald (2006) unconfounded these factors by rendering all words in sentences in constant spatial width. In the present study, the Arial font with proportional letter spacing was used for varying th...

journal_title：Vision research

authors： Hautala J,Hyönä J,Aro M

更新日期：2011-08-01 00:00:00

abstract：:Saccadic eye movements are strongly influenced by shifts of attention to non-target objects. In contrast, we have shown previously that the initiation of smooth pursuit eye movements is relatively unaffected when attention is shifted to objects that are either stationary or move in the same direction as the pursuit ta...

journal_title：Vision research

authors： Souto D,Kerzel D

更新日期：2011-01-01 00:00:00

abstract：:Explorative eye movements specifically target some parts of a scene while ignoring others. Here, we investigate how local image structure--defined by spatial frequency contrast--and informative image content--defined by higher order image statistics-are weighted for the selection of fixation points. We measured eye mo...

journal_title：Vision research

authors： Kayser C,Nielsen KJ,Logothetis NK

更新日期：2006-08-01 00:00:00

abstract：:In a rapid categorisation task, monkeys and humans had to detect a target (animal or food) in briefly flashed (32 ms) and previously unseen natural images. Removing colour cues had very little effect on average performance. Impairments were restricted to a mild accuracy drop (in some human subjects) and a small reacti...

journal_title：Vision research

authors： Delorme A,Richard G,Fabre-Thorpe M

更新日期：2000-01-01 00:00:00

abstract：:The role of the perceptual organization of the visual display on eye movement control was examined in two experiments using a task where a two-saccade sequence was directed toward either a single elongated object or three separate shorter objects. In the first experiment, we examined the consequences for the second sa...

journal_title：Vision research

authors： Vergilino-Perez D,Findlay JM

更新日期：2006-07-01 00:00:00