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Published on: February 8, 2020
Effect of monocular occlusion on lateral phoria
American Journal of Optometry and Physiological Optics
|January 1, 1984
Summary
Monocular occlusion (MO) can cause temporary esophoria, particularly for near vision. Normal binocular vision is restored within 24 hours after discontinuing MO.
Area of Science:
- Ophthalmology
- Neuroscience
- Visual Science
Background:
- Monocular occlusion (MO) is known to induce changes in visual functioning of the non-occluded eye.
- Lateral phoria is a binocular vision phenomenon that describes the relative eye position when binocular fusion is broken.
Purpose of the Study:
- To investigate the impact of 24-hour monocular occlusion on lateral phoria.
- To assess the reversibility of MO-induced phoria changes.
Main Methods:
- Participants underwent 24 hours of monocular occlusion.
- Lateral phoria was measured before and after the occlusion period.
- Follow-up measurements were taken 24 hours after MO termination.
Main Results:
- A significant tendency for increased esophoria was observed after 24 hours of MO.
- This effect was more pronounced for near vision tasks.
- Phoria returned to baseline levels within 24 hours after removing the occlusion.
Conclusions:
- Monocular occlusion can induce transient esophoria, especially affecting near vision.
- The observed changes in phoria are reversible upon cessation of MO.
- Findings have implications for using MO in visual dysfunction treatments and future research.
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