Absorptance and spectral sensitivity measurements of rod photoreceptors of the tiger salamander, Ambystoma tigrinum.

abstract：:The eyespots in cells of streptomycin-bleached strains and of dark-grown cultures of Euglena gracilis, were examined by means of fluorescence microscopy and microspectrophotometry. When viewed with light in the region of 380-500 nm, the stigma appeared as a dark spot. Adjacent to this was a second spot, not seen with ...

journal_title：Vision research

authors： James TW,Crescitelli F,Loew ER,McFarland WN

更新日期：1992-09-01 00:00:00

abstract：:Pattern electroretinograms (PERGs) have been recorded in man and pigeon using phase reversing patterns. Studies were made in both species of the effect of grating spatial frequency, grating profile (sine or square) or the size of the squares of a checkerboard on the amplitude of the responses. The results obtained in ...

journal_title：Vision research

authors： Vaegan,Arden GB

更新日期：1987-01-01 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：:The mechanisms responsible for generating illusory contours are thought to fulfil an adaptive role in providing estimates of missing contour fragments generated by partial camouflage. One striking apparent counter-example to this view was described in Current Biology 21 (2011) 492-496, which showed that illusory conto...

journal_title：Vision research

authors： Anderson BL,Tan K,Marlow PJ

更新日期：2019-05-01 00:00:00

abstract：:In human subjects with peripheral retinal detachments, visual deficits are not restricted to the detached retina but are also present in the non-detached tissue. Based upon studies on a rabbit model of rhegmatogenous retinal detachment, we propose a glial cell-mediated mechanism of spread of retinal degeneration into ...

journal_title：Vision research

authors： Francke M,Faude F,Pannicke T,Uckermann O,Weick M,Wolburg H,Wiedemann P,Reichenbach A,Uhlmann S,Bringmann A

更新日期：2005-08-01 00:00:00

abstract：:To investigate the mechanisms of perceptual learning, we recently introduced a paradigm in which incorrect, reverse feedback followed after some but not all vernier presentations. This feedback paradigm exerted a strong effect on performance that seemed to bias decisions rather than to yield perceptual learning. Here,...

journal_title：Vision research

authors： Herzog MH,Ewald KR,Hermens F,Fahle M

更新日期：2006-10-01 00:00:00

abstract：:Reaction times for detecting sinusoidal gratings depend jointly on grating contrast and spatial frequency. We examine whether the effect of spatial frequency results from low-pass filtering in a single channel or reflects processing of different frequencies by two or more different processing streams. Observers perfor...

journal_title：Vision research

authors： Thomas JP,Fagerholm P,Bonnet C

更新日期：1999-05-01 00:00:00

abstract：:Visual search for a colour target in distractors of two other colours is dramatically affected by the configuration of the colours in CIE (x, y) space. To a first approximation, search is difficult when a target's chromaticity falls directly between (i.e. is not linearly separable from) two distractor chromaticities, ...

journal_title：Vision research

authors： Bauer B,Jolicoeur P,Cowan WB

更新日期：1999-08-01 00:00:00

abstract：:STIMULI. The 1st-order stimuli are moving sine gratings. The 2nd-order stimuli are fields of static visual texture, whose contrasts are modulated by moving sine gratings. Neither the spatial slant (orientation) nor the direction of motion of these 2nd-order (microbalanced) stimuli can be detected by a Fourier analysis...

journal_title：Vision research

authors： Solomon JA,Sperling G

更新日期：1995-01-01 00:00:00

abstract：:We present a remarkably simple illusion that manifests whenever a certain class of flat static patterns are moved across our peripheral visual field. A relative motion is perceived in a direction perpendicular to the true motion. Translatory, looming, and rotational movements of the head or the pattern can all elicit ...

journal_title：Vision research

authors： Pinna B,Brelstaff GJ

更新日期：2000-01-01 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：:This study examined spatial-frequency effects on a motion-pooling process in which spatially distributed local one-dimensional motion signals are integrated into the perception of global two-dimensional motion. Motion pooling over two- to three-octave frequency differences was found to be nearly impossible when all Ga...

journal_title：Vision research

authors： Maruya K,Amano K,Nishida S

更新日期：2010-06-01 00:00:00

abstract：:The main purpose of these experiments was to examine in detail how successfully the uncertainty reduction explanation accounts for the effects of spatial cues in a temporal forced-choice contrast discrimination task in which any one of four well-separated Gabor patches is incremented. In preliminary experiments, it wa...

journal_title：Vision research

authors： Nachmias J

更新日期：2002-01-01 00:00:00

abstract：:Two eyes are better than one at detecting a pattern, an advantage termed binocular summation. It is widely believed that binocular summation is mediated by neurons that sum the two eyes' inputs. Here we suggest an alternative model based on a model of binocular interactions proposed by Cohn, Leong & Lasley (Vision Res...

journal_title：Vision research

authors： Kingdom FAA,Woessner P

更新日期：2021-02-01 00:00:00

abstract：:We present a two-frequency method to investigate lateral interaction components (liERGs) in the human electroretinogram. Adjacent half cycles of sinusoidal gratings were modulated sinusoidally with different temporal frequencies f1 and f2. The liERGs were defined by the Fourier components at the intermodulation freque...

journal_title：Vision research

authors： Meigen T,Prüfer R,Reime S,Friedrich A

更新日期：2005-10-01 00:00:00

abstract：:Recognition of objects improves with training, but task performance also improves between sessions without further training. This offline learning seems to be influenced by post-training sleep, as is evidenced in perceptual learning studies with simple stimuli. In this study we aim to investigate the role of sleep in ...

journal_title：Vision research

authors： Baeck A,Rentmeesters N,Holtackers S,Op de Beeck HP

更新日期：2014-06-01 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：:Pupil responses to light are greatly influenced by initial pupil size. Small pupils, operating under photopic conditions, show tonic responses to step increases of light and high gains; thus the pupil is a good regulator of light. Large pupils, operating under mesopic or scotopic conditions show phasic responses, "pup...

journal_title：Vision research

authors： Sun F,Stark L

更新日期：1983-01-01 00:00:00

abstract：:Several characteristic of aftereffects (especially the motion aftereffect) depend upon the square root of the time spent adapting. The same parameters are here examined for the contrast threshold elevation aftereffect. The time taken to recover is shown to be well predicted by root adaptation time (beyond a minimum du...

journal_title：Vision research

authors： Rose D

更新日期：1992-09-01 00:00:00

abstract：:Reduced perceptual span is one factor which limits reading speed in patients with macular disease. This study measured the perceptual span and the number of saccades to locate a target in 18 patients with macular disease and seven control subjects on two occasions separated by up to 12 months. Perceptual span changed ...

journal_title：Vision research

authors： Crossland MD,Rubin GS

更新日期：2006-02-01 00:00:00

abstract：:The cornea of the goby Pomatoschistus minutus is iridescent. Spectral reflectance measurements show that the colour of the iridescence responds to light shifting to longer wavelengths when illuminated and shifting to shorter wavelengths when dark adapted. After 2-3 hr dark adaptation the iridescence is no longer visib...

journal_title：Vision research

authors： Shand J,Lythgoe JN

更新日期：1987-01-01 00:00:00

abstract：:To achieve perceptual match between a flashed target and a gradually changing one, the flashed target should have the feature value corresponding to the value to be obtained by the gradually changing target only later. Flashed target should be positioned ahead of the continuously moving one in order to be perceived as...

journal_title：Vision research

authors： Bachmann T,Põder E

更新日期：2001-04-01 00:00:00

abstract：:In an attempt to uncover the properties of the psychophysical spatial mechanisms which optimally respond to the vernier offset between two abutting lines, we investigated the effects of one-dimensional band-limited spatial noise masks superimposed with the target, on vernier thresholds. Unidirectional vernier threshol...

journal_title：Vision research

authors： Waugh SJ,Levi DM,Carney T

更新日期：1993-08-01 00:00:00

abstract：:A pincushion formed by four arcs on a gray background looks darker when the arcs are black, and lighter when the arcs are white. Yet, a matching-experiment shows that this difference is relative. Whereas the apparently darker pincushion requires a matching luminance that is lower than the background luminance (i.e. as...

journal_title：Vision research

authors： De Weert CM,Spillmann L

更新日期：1995-05-01 00:00:00

abstract：:This study examined the manner in which the On and Off systems originating in the retina make their connections with the lateral geniculate nucleus (LGN) of the rhesus monkey. 2-amino-4-phosphonobutyric acid (APB) was either infused or injected into the vitreous chamber of the eye to block the On channel while the res...

journal_title：Vision research

authors： Schiller PH

更新日期：1984-01-01 00:00:00

abstract：:How does nearby motion affect the perceived speed of a target region? When a central drifting Gabor patch is surrounded by translating noise, its speed can be misperceived over a fourfold range. Typically, when a surround moves in the same direction, perceived centre speed is reduced; for opposite-direction surrounds ...

journal_title：Vision research

authors： Baker DH,Graf EW

更新日期：2010-01-01 00:00:00

abstract：:Visual marking refers to the phenomenon in which old items in a visual search are excluded from the search when new items appear in the visual field. Visual marking may result from inhibition of irrelevant information at the location of old items before new items appear. Moreover, sensitivity to increments in contrast...

journal_title：Vision research

authors： Osugi T,Murakami I

更新日期：2014-02-01 00:00:00

abstract：:The selectivities of neurons in primary visual cortex are often considered to be adapted to the statistics of natural images. Accordingly, simple cell-like tuning emerges when unsupervised learning models that seek sparse representations of input probabilities are trained on natural scenes. However, orientation tuning...

journal_title：Vision research

authors： Hsu AS,Dayan P

更新日期：2007-10-01 00:00:00

abstract：:It is possible to discriminate between grating contrasts over a 300-fold contrast range, whereas V1 neurons have very limited dynamic ranges. Using populations of model neurons with contrast-response parameters taken from electrophysiological studies (cat and macaque), we investigated ways of combining responses to co...

journal_title：Vision research

authors： Clatworthy PL,Chirimuuta M,Lauritzen JS,Tolhurst DJ

更新日期：2003-08-01 00:00:00

abstract：:While saccadic eye movements produce rapid shift of images of objects on the retina, the visual world is perceived as stationary (visual stability), but the precise mechanisms involved in such perception remain unclear. We investigated if visual stimuli existing before and/or after a saccade serve to preserve visual s...

journal_title：Vision research

authors： Honda H

更新日期：2006-10-01 00:00:00