Visual test of Listing's law during vergence.

abstract：BACKGROUND:According to the Helmholtz theory of accommodation the loss of accommodation amplitude is caused by the growing sclerosis of the crystalline lens, whereas the ciliary muscle and the lens capsule are mainly uneffected by age. A permanent treatment method for presbyopia which offers a dynamic accommodation abi...

journal_title：Vision research

authors： Schumacher S,Oberheide U,Fromm M,Ripken T,Ertmer W,Gerten G,Wegener A,Lubatschowski H

更新日期：2009-07-01 00:00:00

abstract：:It has been shown that in the initial stages of motion processing, the ON and OFF pathways stay more or less separated. There is evidence that this distinction between motion signals from opposite contrast polarities remains at least partly intact in the integration stage of local motion information. At the same time,...

journal_title：Vision research

authors： van der Smagt MJ,Breij EC,van de Grind WA

更新日期：2000-01-01 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：:Feature-directed attention has been recently studied in various psychophysical, electrophysiological, and imaging studies. Convincing evidence has been obtained for its global effectiveness, but there is a debate about the processing fate of non-attended target features. A number of studies demonstrated feature-direct...

journal_title：Vision research

authors： Wegener D,Ehn F,Aurich MK,Galashan FO,Kreiter AK

更新日期：2008-12-01 00:00:00

abstract：:Binocular rivalry properties for contrast-modulated (CM) gratings were examined to gain insight into their locus of processing. Two orthogonally orientated gratings were presented, one to each eye. Perceptual change rates, proportions of exclusivity and mixed percepts, and mean durations were calculated. Stimuli were ...

journal_title：Vision research

authors： Skerswetat J,Formankiewicz MA,Waugh SJ

更新日期：2016-04-01 00:00:00

abstract：:Adaptation paradigms highlight the dynamic nature of face coding and suggest that identity is coded relative to an average face that is tuned by experience. In low-level vision, adaptive coding can enhance sensitivity to differences around the adapted level. We investigated whether sensitivity to differences around th...

journal_title：Vision research

authors： Rhodes G,Maloney LT,Turner J,Ewing L

更新日期：2007-03-01 00:00:00

abstract：:Rapid texture segregation is examined using filtered noise textures. The stimuli consist of a foreground region of filtered noise with one dominant texture orientation against a background region with a different dominant orientation. Shape discrimination of the foreground region is measured as a function of the diffe...

journal_title：Vision research

authors： Landy MS,Bergen JR

更新日期：1991-01-01 00:00:00

abstract：:We investigated the perception of local surface orientation on a simple smooth object, under several different illumination conditions. The perceived local orientation was determined for several points on the surface and quantified as slant and tilt of the local tangent plane. We found an underestimation of the percei...

journal_title：Vision research

authors： Mamassian P,Kersten D

更新日期：1996-08-01 00:00:00

abstract：:Characterization of the visual system as a linear system has many consequences. One property implied by such a characterization is that signal-to-noise ratio at threshold is constant, so that the contrast energy of a sinusoidal grating at threshold depends on the effective noise passed by the filter used to detect the...

journal_title：Vision research

authors： Perkins ME,Landy MS

更新日期：1991-01-01 00:00:00

abstract：:Contour interpolation is the process whereby spatially separated object fragments (inducers) are connected on the basis of their contour relations. An important characteristic of interpolation between simultaneously presented inducers is that observers rely on interpolation regions to perform a discrimination task. Ho...

journal_title：Vision research

authors： Keane BP,Lu H,Kellman PJ

更新日期：2007-12-01 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：:Face exposure during development determines adults' abilities to recognize faces and the information they use to process them. Individual differences in the face categories represented in the visual environment can lead to category-specific deficits for recognizing faces that are atypical of observer's experience (e.g...

journal_title：Vision research

authors： Balas B,Saville A

更新日期：2017-12-01 00:00:00

abstract：:Two visually evoked brain responses were elicited simultaneously by stimulating the eye with two superimposed sinewave grating patterns that were temporally modulated at slightly different rates. The VEP to one grating was comparatively little affected by the presence of the other grating when the two spatial frequenc...

journal_title：Vision research

authors： Regan D

更新日期：1983-01-01 00:00:00

abstract：:To determine the physical size and global three-dimensional (3-D) shape of an object, retinal size and retinal disparity have to be scaled in accordance with the object's distance. We examined whether the distance used for scaling retinal disparity is the same as the distance used for scaling retinal size. Subjects ad...

journal_title：Vision research

authors： van Damme W,Brenner E

更新日期：1997-03-01 00:00:00

abstract：:If two demarcated dots are embedded in separate clusters of similar dots in off centre positions, their perceived separation is biased towards the separation between the centres of the clusters (Morgan, Hole, & Glennerster, 1990). We replicated these results and went on to determine whether a similar bias is present f...

journal_title：Vision research

authors： Seizova-Cajic T,Gillam B

更新日期：2006-08-01 00:00:00

abstract：:Recent research has shown that reading disabled children find it unusually difficult to detect flickering or moving visual stimuli, consistent with impaired processing in the magnocellular visual stream. Yet, it remains controversial to suggest that reduced visual sensitivity of this kind might affect children's readi...

journal_title：Vision research

authors： Cornelissen PL,Hansen PC,Hutton JL,Evangelinou V,Stein JF

更新日期：1998-02-01 00:00:00

abstract：:The widespread nature of diabetes affects all organ systems of an individual including the bone marrow. Long-term damage to the cellular and extracellular components of the bone marrow leads to a rapid decline in the bone marrow-hematopoietic stem/progenitor cells (HS/PCs) compartment. This review will highlight the i...

journal_title：Vision research

authors： Bhatwadekar AD,Duan Y,Korah M,Thinschmidt JS,Hu P,Leley SP,Caballero S,Shaw L,Busik J,Grant MB

更新日期：2017-10-01 00:00:00

abstract：:We investigated the manner in which the outputs of the three postreceptoral mechanisms (red-green, blue-yellow and luminance) combine to determine contrast threshold. We used a subthreshold summation paradigm to test whether the combination of the postreceptoral mechanism outputs could be described by a probability su...

journal_title：Vision research

authors： Mullen KT,Sankeralli MJ

更新日期：1999-02-01 00:00:00

abstract：:We investigated temporal aspects of stereoscopically perceived slant produced by the following transformations: horizontal scale, horizontal shear, vertical scale, vertical shear, divergence and rotation, between the half-images of a stereogram. Six subjects viewed large field stimuli (70 degrees diameter) both in the...

journal_title：Vision research

authors： van Ee R,Erkelens CJ

更新日期：1998-12-01 00:00:00

abstract：:Temporal frequency discrimination was measured above threshold with a two-alternative spatial forced-choice procedure. Stimuli were two 1 deg homogeneous fields modulated around a mean luminance of 3.7 log trolands. Observers determined which of the two stimuli was modulated at a higher frequency. To avoid differences...

journal_title：Vision research

authors： Mandler MB

更新日期：1984-01-01 00:00:00

abstract：:We have examined the ability of observers to parse bimodal local-motion distributions into two global motion surfaces, either overlapping (yielding transparent motion) or spatially segregated (yielding a motion boundary). The stimuli were random dot kinematograms in which the direction of motion of each dot was drawn ...

journal_title：Vision research

authors： Smith AT,Curran W,Braddick OJ

更新日期：1999-03-01 00:00:00

abstract：:Previous studies of peripheral vision have shown that detection acuity is superior to resolution acuity for gratings over a range of contrasts, which is attributed to different limiting mechanisms (contrast insufficiency and neural undersampling) for the two tasks. To extend the analysis to letters in a way that avoid...

journal_title：Vision research

authors： Demirel S,Anderson RS,Dakin SC,Thibos LN

更新日期：2012-04-15 00:00:00

abstract：:Electrophysiological recording demonstrated that visuo-tectal projections are topographically organised after optic nerve regeneration in aged Xenopus laevis. 3H-thymidine autoradiography confirmed previous reports [Taylor, Lack, & Easter, Eur. Journal of Neuroscience 1 (1989) 626-638] that cell division had already c...

journal_title：Vision research

authors： Beaver RS,Dunlop SA,Harman AM,Stirling RV,Easter SS,Roberts JD,Beazley LD

更新日期：2001-06-01 00:00:00

abstract：:Glass patterns are randomized dot arrays that generate the perception of a global structure. They consist of correlated dot pairs which are generated by geometric transformations. The present study employed behavioral and event-related brain potential (ERP) measures to characterize the underlying neuronal processing w...

journal_title：Vision research

authors： Ohla K,Busch NA,Dahlem MA,Herrmann CS

更新日期：2005-09-01 00:00:00

abstract：:Saleh and Bonnet [Fechner Day 98, p. 344] have shown that, upon parafoveal stimulation and up to 6.5 c/deg, reaction time (RT) is a function of grating contrast multiplied by grating period. The present experiments extend these findings to foveal stimulation within a wider spatial-frequency (SF) range and to stimuli o...

journal_title：Vision research

authors： Vassilev A,Mihaylova M,Bonnet C

更新日期：2002-03-01 00:00:00

abstract：:As impaired S-cone function has been reported psychophysically this study assessed S-cone function during high altitude exposure using electroretinography (ERG) and investigated a possible association with severity of acute mountain sickness (AMS). This work is related to the Tübingen High Altitude Ophthalmology (THAO...

journal_title：Vision research

authors： Schatz A,Dominik Fischer M,Schommer K,Zrenner E,Bartz-Schmidt KU,Gekeler F,Willmann G

更新日期：2014-04-01 00:00:00

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：:Fixation disparity or vergence noise produce instantaneous vergence errors. These errors are analogous to the imposition of a pedestal disparity, which is known to elevate stereothresholds. In this study, stereothresholds were measured as a function of induced vergence errors in subjects with normal binocular vision. ...

journal_title：Vision research

authors： Ukwade MT,Bedell HE,Harwerth RS

更新日期：2003-01-01 00:00:00

abstract：:Shape primitives have long been proposed as components for object models in the visual system, and account for a considerable body of behavioral findings. While a large amount of effort has been devoted to the study of detection of these parts in the scenes, no research has been undertaken simulating the acquisition o...

journal_title：Vision research

authors： Shams L,von der Malsburg C

更新日期：2002-08-01 00:00:00

abstract：:Binocular disparity is a powerful cue for the perception of depth. The accuracy with which observers can judge depth from disparity can, however, be very poor. This has been attributed to difficulties associated with the scaling of disparity to take account of distance (Johnston, 1991). We test potential strategies th...

journal_title：Vision research

authors： O'Kane LM,Hibbard PB

更新日期：2010-06-01 00:00:00