Showing papers by "Clifton M. Schor published in 1985"
TL;DR: Both the falloff of sensitivity with disparity pedestal and the disparity range of quantitative stereo depth lead to the conclusion that different size-tuned channels process disparity differently.
Abstract: We have used stimuli with difference-of-Gaussian (DOG) luminance profiles to measure depth-increment thresholds within postulated spatial channels as functions of depth from the fixation plane. Stereoacuity was best with high-frequency DOG’s presented at the fixation plane. Performance was relatively constant for spatial frequency above 2.4 cycles/deg, but it deteriorated as spatial frequency was decreased. Regardless of spatial frequency, stereo sensitivity declined rapidly as stimuli were presented away from the horopter. The falloff occurred more rapidly over the 0–20-arc-min range than over the 20–80-arc-min range. Depth was perceived over a broader range of disparity pedestals with low-spatial-frequency stimuli; however, the lowest thresholds were always obtained with the highest-frequency stimuli. Both the falloff of sensitivity with disparity pedestal and the disparity range of quantitative stereo depth lead to the conclusion that different size-tuned channels process disparity differently.
112 citations
TL;DR: Directional preferences of OKN in amblyopia to nasalward stimulus movement for the foveal and concentric peripheral stimuli are found and a normal preference was found for nasalward and temporalward stimulus field movement imaged on the nasal and temporal hemiretinae respectively.
41 citations
TL;DR: There must be different limiting factors for the two hyperacuity tasks because both hyperacuities are poorer with low spatial frequencies but vernier was effected to a smaller extent.
33 citations
TL;DR: The results support the clinical use of graphical analysis of mutual interactions between accommodation and convergence in the diagnosis of accommodative vergence disorders.
Abstract: Several possible models of interactions between accommodation and convergence are compared. Accommodative and fusional vergence effort are predicted for each model using the same set of clinical data. Only one model makes predictions that are consistent with clinical and laboratory observations of fixation disparity. The results support the clinical use of graphical analysis of mutual interactions between accommodation and convergence in the diagnosis of accommodative vergence disorders.
33 citations