Binocular vision; human development, ocular motility, strabismus, and amblyopia
The central theme of my research activities is motor-sensory properties of binocular vision. Oculomotor studies are of accommodation,
vergence, and yoked versional eye movements. Studies of accommodation investigate its stimulus (contrast increment thresholds and
odd-error cues such as looming) as well as adaptive responses of tonic accommodation to lenses. Studies of vergence eye movements
also investigate its stimulus (features of the luminance distribution used to encode disparity and interactions between depth stimuli
to vergence) and tonic vergence adaptation. The organization of mutual cross-coupling interactions between accommodation and vergence
are also under investigation. Recently we have begun an investigation of adaptability of the yoking between versional eye movements
(Hering's Law) in response to aniseikonia. Sensory studies of binocular vision are of stereopsis, binocular rivalry, and depth cue
interactions.
Studies of stereopsis investigate depth hyperacuities (vernier offset, gap resolution, and thickness discrimination), the spatial
features in the luminance distribution used to compute disparity, and contrast effects in the disparity domain (proportion of correlation).
Investigations of binocular inhibitory interactions include spatial interactions in binocular orientation rivalry and suppression of
anisometropic blur.
Finally, we are investigating non-linear interactions of depth cues such as looming and dynamic disparity in suprathreshold depth
perception.
Unique aspects of the lab include the SRI eye tracker-optometer apparatus, modeling of binocular motor control, and unique studies of
sensory motor interaction.
Selected Publications
Berends, E., Zhang Z. and Schor C.M. (2003) Eye movements facilitate stereo-slant discrimination when horizontal disparity is noisy.Journal of Vision, Dec 05;3(11):780-794.
Zhang, Z., Berends, E. and Schor, C.M. (2003) Thresholds for stereo-slant discrimination between spatially separated targets are influenced mainly by visual and memory factors but not oculomotor instability. Journal of Vision, Nov 24;3(11):710-24.
Maxwell, J. and Schor, C.M. (2004) Symmetrical horizontal vergence contributes to asymmetrical pursuit of targets in depth. Vision Research, 44, 3015-3024.
Zhang, Z., Cantor, C., Ghose, T. and Schor, C.M. (2004) Temporal aspects of spatial interactions affecting stereo-matching solutions. Vision Research, 44, 3183-3192
Berends E. and Schor, C.M. (2005) Stereo-slant adaptation is high-level and does not involve disparity coding. Journal of Vision, Feb 05; 5, 71-80.
Bharadwaj, S.R. and Schor, C.M. (2005) Acceleration characteristics of human ocular accommodation. Vision Research, 45, 17-28.
Schor, C.M. and Bharadwaj, S.R. (2005) A pulse-step model of accommodation dynamics in the aging eye.Vision Research, 45, 1237-1254.
Links
Schor Binocular Vision Research Lab
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