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Published on: December 4, 2013
Ocular prevalence: difference between crossed and uncrossed disparities of stereo objects
Wolfgang Jaschinski1, Volkhard Schroth
1Institut für Arbeitsphysiologie, Dortmund, Germany. jaschinski@ifado.de
Strabismus
|December 18, 2008
Summary
Most people with normal binocular vision experience ocular prevalence, where one eye
Area of Science:
- Vision Science
- Ophthalmology
- Perceptual Psychology
Background:
- Ocular prevalence, an unequal weighting of one eye in stereo vision, is common.
- This study investigated if ocular prevalence is asymmetric for crossed versus uncrossed stereo disparities.
Purpose of the Study:
- To determine if ocular prevalence differs between crossed and uncrossed stereo disparities.
- To assess the frequency of asymmetric ocular prevalence in individuals with normal binocular vision.
Main Methods:
- 11 subjects with normal vision and high stereo resolution participated.
- A vertical line was presented dichoptically at various crossed/uncrossed stereo disparities.
- Subjects judged the stereo object's position relative to a reference line.
Main Results:
- Ten out of 11 subjects exhibited ocular prevalence.
- Only 3 out of 10 subjects with ocular prevalence showed a significant asymmetry between crossed and uncrossed disparities.
Conclusions:
- Ocular prevalence is frequent in normal binocular vision.
- Asymmetric ocular prevalence is rare, and its clinical significance is uncertain.