Abstract：
:Horizontal single-step stimuli were presented to 19 subjects with congenital nystagmus (CN). When the stimulus jump was in the same direction as the waveform beat, spatial and temporal measurements of the responses revealed that saccades occurring between 90 and 180 msec after the stimulus were directed to an average of the spatial locations of the initial and final target positions. Transition functions of response end position against delay resembled those collected from normal subjects responding to either double-step staircase or pulse-overshoot stimuli, according to the stimulus direction. An analogy is drawn between the response to a single-step stimulus in the presence of CN and responses made by normal subjects to double-step stimuli. These findings suggest that pathways involved in the computation of amplitude of visually guided saccades also participate in programming CN quick phases and that the time taken to programme CN quick phases is similar to that for voluntary saccades. Evidence of saccadic parallel processing was demonstrated in some, but not all, of the subjects. Responses to steps in the same direction as the nystagmus beat frequently overshot the target. The mean overshoot was proportional to the amplitude and intensity of the nystagmus. Responses to stimuli presented in a direction opposite to the nystagmus beat were as accurate as the responses of a normal control group.
journal_name
Vision Resjournal_title
Vision researchauthors
Worfolk R,Abadi RVdoi
10.1016/0042-6989(91)90029-5subject
Has Abstractpub_date
1991-01-01 00:00:00pages
1819-30issue
10eissn
0042-6989issn
1878-5646pii
0042-6989(91)90029-5journal_volume
31pub_type
杂志文章相关文献
VISION RESEARCH文献大全abstract：:Accommodative loss represents the fastest human biological decrement. Why? To examine this, the shape of the eye-lens during accommodation or its relaxation is analysed with special reference to age-related changes. The capsule is viewed as a force transmitter: the distribution of forces along centripetal capsular arc...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/s0042-6989(00)00091-2
更新日期：2000-01-01 00:00:00
abstract：:In adult golden hamsters (Mesocricetus auratus), the optic nerve was bilaterally sectioned with one side grafted with the sciatic nerve to make a bridge to the ipsilateral superior colliculus. Shuttle-box avoidance was tested using light as the conditioned stimulus. Three of the five transplanted animals revealed stat...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(93)90070-d
更新日期：1993-05-01 00:00:00
abstract：:Quantitative light microscopic techniques have been applied to photoreceptors, ganglion cells and dopaminergic amacrine cells in the retina of the North American opossum Didelphis virginiana. This marsupial has a retina with a central areal specialization where ganglion cells reach a maximum density of 2900/mm2 and co...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(85)90035-5
更新日期：1985-01-01 00:00:00
abstract：:A photic stimulus flashed just before a saccade in the dark tends to be mislocalized in the direction of the saccade. This mislocalization is not only perceptual; it is also expressed by errors of ocular targeting. A particular situation arises if the point of light is flashed twice at the same place, the second time,...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(95)00021-q
更新日期：1995-08-01 00:00:00
abstract：:Photoreceptors of adult and larval zebrafish were assayed by microspectrophotometry to characterize their visual pigments, and to determine when the visual pigments first appear during development. Short single cone outer segments contained a pigment with a lambdamax near 417 nm. Long single cones and long members of ...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(85)90127-0
更新日期：1985-01-01 00:00:00
abstract：:Previous studies have shown that spatial context influences the perceptual interpretation of ambiguous figures such as the Necker cube; however, the properties that mediate the influences of an unambiguous spatial context have yet to be investigated. Here we consider the effect of the motion and position of an unambig...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2016.02.005
更新日期：2016-09-01 00:00:00
abstract：:A common computation in visual cortex is the divisive normalization of responses by a pooled signal of the activity of cells within its neighborhood. From a geometrical point of view, normalization constraints the population response to high-contrast stimuli to lie on the surface of a high-dimensional sphere. Here we ...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2009.12.007
更新日期：2010-10-28 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
pub_type： 杂志文章
doi：10.1016/s0042-6989(97)00445-8
更新日期：1998-12-01 00:00:00
abstract：:Neural degeneration in glaucoma involves retinal ganglion cells and neurons of their major target, the lateral geniculate nucleus (LGN). Dendrites of relay LGN neurons projecting to the visual cortex were studied by immunocytochemical and quantitative Sholl analysis in combination with confocal microscopy and 3D-morph...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2010.08.003
更新日期：2011-01-28 00:00:00
abstract：:How the visual brain integrates temporally dispersed information is an open question. Often, it is assumed that the visual system simply sums light over a certain period of time (e.g. Bloch's law). However, in feature fusion, information presented later dominates, suggesting complex temporal dynamics that cannot be de...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2007.05.004
更新日期：2007-08-01 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
pub_type： 杂志文章
doi：10.1016/s0042-6989(98)00121-7
更新日期：1999-02-01 00:00:00
abstract：:Flickering lights can be uncomfortable to look at and can induce seizures in observers with photosensitive epilepsy. However, the temporal characteristics contributing to these effects are not fully known. In the spatial domain, one identified source of visual discomfort is when images have Fourier amplitude spectra t...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2017.05.015
更新日期：2017-09-01 00:00:00
abstract：:In the ultimate stage of the Adelson-Bergen motion energy model [Adelson, E. H., & Bergen, J. (1985). Spatiotemporal energy models for the perception of motion. Journal of the Optical Society of America, 2, 284-299], motion is derived from the difference between directionally opponent energies E(L) and E(R). However, ...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2004.10.018
更新日期：2005-04-01 00:00:00
abstract：:Smooth pursuit eye movements superimpose additional motion on the retinal image of untracked visual targets, potentially leading to the perception of motion smear and a distortion of the perceived direction of motion. Previously, we demonstrated an attenuation of perceived motion smear when the untracked target moves ...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2006.12.002
更新日期：2007-03-01 00:00:00
abstract：:There is ample psychophysical evidence that flicker is more salient in the peripheral than the central visual field, but the physiological basis of this eccentricity-dependant change is unclear. Here, we compared responsivity to temporal modulation of ganglion cells in central and peripheral primate retina. Above 30 H...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/s0042-6989(02)00414-5
更新日期：2002-12-01 00:00:00
abstract：:In the natural world, a binocular discrepancy of luminance can signal a glossy surface. Using a spatial forced choice task, we have measured the ability of subjects to detect binocular luminance disparities. We show that the detection of binocular luminance disparity shares several basic psychophysical features with t...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2009.05.001
更新日期：2009-07-01 00:00:00
abstract：:Bees are predominantly diurnal; only a few groups fly at night. An evolutionary limitation that bees must overcome to inhabit dim environments is their eye type: bees possess apposition compound eyes, which are poorly suited to vision in dim light. Here, we theoretically examine how nocturnal bees Megalopta genalis fl...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2006.01.002
更新日期：2006-07-01 00:00:00
abstract：:A system of regular, radial ridges, spaced approx. 250 nm apart, is reported from the outer corneal surface of the eye of the tiny moth Leucoptera coffeella. Antireflective coatings in larger insects with flatter facets often take the form of corneal nipples. However, evidence is presented that in an insect whose eyes...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(93)90223-j
更新日期：1993-12-01 00:00:00
abstract：:We measured two- and three-line spatial interval and alignment thresholds for a wide range of separations and eccentricities. In order to avoid confounding the role of separation and eccentricity, the test lines were presented on iso-eccentric arcs, with radii between 0.625 and 10 deg. The iso-eccentric paradigm allow...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(90)90068-v
更新日期：1990-01-01 00:00:00
abstract：:To pursue a small target moving in front of a drifting background, motion vectors from the target need to be integrated and segmented from those belonging to the background. Smooth pursuit eye movements typically integrate target and background directions initially and after some time shift towards the veridical targe...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2012.02.001
更新日期：2012-03-15 00:00:00
abstract：:A modified version of the 'path finder' display consisting of many small oriented Gabor patches was used to study the joint contributions of spatial and temporal structures to shape perception. A two-interval forced-choice procedure measured detectability of curved 'paths' defined by orientation ('good continuation') ...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/s0042-6989(01)00086-4
更新日期：2001-07-01 00:00:00
abstract：:The dependence of spatial frequency on accommodation has been investigated extensively. Recently, differences between myopes and emmetropes with respect to accommodative microfluctuations for high spatial frequency targets have been reported. Considering the diversity of accommodative responses (ARs) to sinusoidal gra...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2015.05.020
更新日期：2015-10-01 00:00:00
abstract：:Prolonged inspection of moving stimuli causes stationary stimuli to appear moving in the opposite direction to the adapting stimulus (the Waterfall effect). It has been claimed that distracting the viewer's attention from the adapting stimulus by a secondary task reduces the strength of adaptation. However, the method...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2011.12.009
更新日期：2012-02-15 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
pub_type： 杂志文章
doi：10.1016/j.visres.2006.04.024
更新日期：2006-10-01 00:00:00
abstract：:Large and small letter contrast sensitivity and visual acuity were assessed in 37 elderly eyes (mean VA -0.01 logMAR, Snellen 6/6) and their lens opacities were categorised and graded using the LOCS III system. Large letter contrast sensitivity was often not reduced in cataract from age-matched normal values and provi...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/s0042-6989(97)00382-9
更新日期：1998-06-01 00:00:00
abstract：:Horizontal pursuit eye movements were investigated in two separate groups of children: One group exhibited developmental co-ordination disorder (n = 8) whilst another group of children were born prematurely (n = 8). Both studies found a reduced gain in pursuit eye movements when the respective populations were compare...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/s0042-6989(97)00399-4
更新日期：1998-06-01 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
pub_type： 杂志文章
doi：10.1016/0042-6989(84)90020-8
更新日期：1984-01-01 00:00:00
abstract：:The association between perceived visual direction and retinal location has been considered to be specified at birth and unmodifiable. We found that small changes occurred in the visual direction associated with a peripheral retinal location when the amplitudes of saccadic eye movements to a target imaged at that loca...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(88)90161-7
更新日期：1988-01-01 00:00:00
abstract：:We have measured corneal and total astigmatism on 161 eyes of 90 normal infants and young children aged 2 months to 5 years using the techniques of photorefraction and photokeratometry. Both the mean corneal and mean total astigmatism were found to decrease with increasing age. We found large and significant correlati...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(85)90082-3
更新日期：1985-01-01 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
pub_type： 杂志文章
doi：10.1016/0042-6989(92)90151-8
更新日期：1992-09-01 00:00:00
