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Updated: Jul 28, 2026
08:04
Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
Published on: December 4, 2013
Sensitivity to disparity corrugations in peripheral vision.
1Department of Experimental Psychology, Oxford University, South Parks Road, Oxford OX1 3UD, UK. prince@psy.ox.ac.uk
Vision Research
|July 16, 2002
Summary
Visual acuity for disparity corrugations decreases with retinal eccentricity. However, M-scaling demonstrates that disparity modulation detection remains constant across cortical distance, suggesting consistent visual processing beyond the fovea.
Area of Science:
- Vision science
- Neuroscience
- Visual perception
Background:
- Disparity discrimination thresholds increase with retinal eccentricity and distance from the horopter.
- Detectability of cyclopean gratings across retinal positions is not well understood.
Purpose of the Study:
- To investigate how the detectability of cyclopean gratings changes with retinal position.
- To measure disparity corrugation thresholds as a function of corrugation frequency at different visual eccentricities.
Main Methods:
- Subjects viewed annular displays of random dot stereograms.
- Participants judged the presence of circumferential disparity modulation in two intervals.
- Thresholds for disparity corrugations were measured across varying eccentricities and corrugation frequencies.
Main Results:
- Visual sensitivity to disparity corrugations exhibited a bandpass characteristic at any given eccentricity.
- Increasing eccentricity from 3.5 to 21.0 degrees led to higher thresholds, decreased optimal corrugation frequency, and a lower upper cutoff frequency.
- Replotting data using M-Scaling functions showed peak detection frequency remained constant at 0.8 cycles per mm of cortex.
Conclusions:
- Visual acuity for disparity modulations is approximately M-scaled beyond the fovea.
- Cortical magnification plays a crucial role in maintaining consistent disparity modulation detection across eccentricities.
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