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Binocular summation and visual function with induced anisocoria and monovision
José J Castro1, Margarita Soler1, Carolina Ortiz1
1Laboratory of Vision Sciences and Applications, Department of Optics, University of Granada, 18071 Granada, Spain.
Biomedical Optics Express
|November 22, 2016
Summary
Inducing anisocoria and adding lens power degrades binocular vision, increasing halos and reducing contrast sensitivity. However, low lens power may be clinically acceptable for presbyopia correction.
Area of Science:
- Ophthalmology
- Optometry
- Vision Science
Background:
- Advances in presbyopia correction, like small aperture and monovision, necessitate understanding binocular vision.
- Anisocoria and varying add powers impact visual performance.
Purpose of the Study:
- To investigate the binocular visual performance under induced anisocoria and different add powers.
- To analyze visual discrimination and contrast sensitivity in relation to anisocoria and add power.
Main Methods:
- 12 subjects participated in the study.
- Anisocoria was induced with varying degrees, combined with two add powers in the non-dominant eye.
- Visual performance was assessed using visual discrimination capacity (halos) and contrast sensitivity.
Main Results:
- Induced anisocoria and add power deteriorated binocular vision.
- Increasing anisocoria led to more perceived halos, lower contrast sensitivity, and reduced binocular summation.
- Visual discrimination capacity showed increased perception of halos.
Conclusions:
- Binocular vision deteriorates with induced anisocoria and add power.
- Low add power with anisocoria may be clinically acceptable for presbyopia correction, maintaining contrast sensitivity and visual discrimination.
- Further research into binocular aspects of presbyopia correction techniques is warranted.
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