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Clifton M. Schor

Bio: Clifton M. Schor is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Binocular vision & Stereopsis. The author has an hindex of 47, co-authored 187 publications receiving 6765 citations. Previous affiliations of Clifton M. Schor include Helen Wills Neuroscience Institute & Smith-Kettlewell Institute.


Papers
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Journal ArticleDOI
TL;DR: At low spatial frequencies the sensory fusion limit equals the upper disparity limit for stereoscopic depth perception which suggests that a common mechanism underlies these two phenomena.

220 citations

Journal ArticleDOI
TL;DR: The disparity range for stereo sensitivity was investigated with spatially filtered bars, tuned narrowly over a broad range of spatial frequencies, and it was revealed that greater amounts of uncrossed than crossed disparity were required to match suprathreshold disparities.

204 citations

Journal ArticleDOI
TL;DR: Results indicate that the slow vergence controller is located before the site of interaction between convergence and accommodation, and is unaffected by accommodative vergence when disparity vergence is open loop.

176 citations

Journal Article
TL;DR: Comparisons between the frequency response for OKN and the contrast sensitivity function for perceived motion revealed that amblyopes with asymmetric OKN had equal sensitivity to nasal and temporal target motion.
Abstract: Horizontal and vertical small-field optokinetic nystagmus (OKN) were examined in persons with strabismic or anisometropic amblyopia. Reduced velocity for the slow phase of OKN driven by temporalward and upward target motion presented monocularly was observed in both the amblyopic and nonamblyopic eyes of some subjects. Several experiments were conducted in search of a sensory disturbance of perceived motion sensitivity which could account for the abnormal OKN. Comparisons between the frequency response for OKN and the contrast sensitivity function for perceived motion revealed that amblyopes with asymmetric OKN had equal sensitivity to nasal and temporal target motion. Contrast thresholds for driving the temporal slow phase of OKN were elevated by over 1 log unit above contrast thresholds for perceived temporal target motion, whereas contrast thresholds for stimulating nasal movement and driving the nasalward slow phase of OKN were equal. Contrast sensitivity to nasal and temporal target motion was symmetrical at thefovea and parafovea of the amblyopic eye. These studies did not reveal a sensory anomaly as the basis for abnormal OKN in amblyopia. Directional asymmetries in OKN were also observed in both eyes of persons with congenital strabismus without amblyopia and in the nondeprived eye in monocular congenital cataract. These observations suggest a relationship between directional asymmetries of OKN and the incomplete development of binocular vision.

164 citations


Cited by
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Journal ArticleDOI
TL;DR: The Computational Brain this paper provides a broad overview of neuroscience and computational theory, followed by a study of some of the most recent and sophisticated modeling work in the context of relevant neurobiological research.

1,472 citations

Journal ArticleDOI
TL;DR: This display is used to evaluate the influence of focus cues on perceptual distortions, fusion failures, and fatigue and shows that when focus cues are correct or nearly correct, the time required to identify a stereoscopic stimulus is reduced, stereoacuity in a time-limited task is increased, and distortions in perceived depth are reduced.
Abstract: Three-dimensional (3D) displays have become important for many applications including vision research, operation of remote devices, medical imaging, surgical training, scientific visualization, virtual prototyping, and more. In many of these applications, it is important for the graphic image to create a faithful impression of the 3D structure of the portrayed object or scene. Unfortunately, 3D displays often yield distortions in perceived 3D structure compared with the percepts of the real scenes the displays depict. A likely cause of such distortions is the fact that computer displays present images on one surface. Thus, focus cues-accommodation and blur in the retinal image-specify the depth of the display rather than the depths in the depicted scene. Additionally, the uncoupling of vergence and accommodation required by 3D displays frequently reduces one's ability to fuse the binocular stimulus and causes discomfort and fatigue for the viewer. We have developed a novel 3D display that presents focus cues that are correct or nearly correct for the depicted scene. We used this display to evaluate the influence of focus cues on perceptual distortions, fusion failures, and fatigue. We show that when focus cues are correct or nearly correct, (1) the time required to identify a stereoscopic stimulus is reduced, (2) stereoacuity in a time-limited task is increased, (3) distortions in perceived depth are reduced, and (4) viewer fatigue and discomfort are reduced. We discuss the implications of this work for vision research and the design and use of displays.

1,459 citations

Journal ArticleDOI
TL;DR: Lasing in disordered media presents both theoretical challenges and practical opportunities as mentioned in this paper, and both theoretical and practical challenges and opportunities are discussed in detail in Section 5.1.1].
Abstract: Lasing in disordered media presents both theoretical challenges and practical opportunities.

1,330 citations

Journal Article
01 Jan 1990
TL;DR: Binocular vision and ocular motility, Binocular sight and ophthalmology, کتابخانه دیجیتال جندی شاپور اهواز
Abstract: Binocular vision and ocular motility , Binocular vision and ocular motility , کتابخانه دیجیتال جندی شاپور اهواز

1,021 citations