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Visual field area in phakic, aphakic, and pseudophakic individuals
1School of Optometry, University of Waterloo, Ontario, Canada.
Summary
Cataract surgery patients showed constricted visual fields compared to normal individuals. This suggests factors beyond media clarity, like retinal changes or implant material, may impact visual field size.
Area of Science:
- Ophthalmology
- Visual Science
Background:
- Cataract surgery involves replacing the natural lens with an intraocular lens (IOL).
- Visual field testing is crucial for assessing peripheral vision and detecting abnormalities.
Purpose of the Study:
- To compare visual field parameters in pseudophakic subjects post-cataract surgery with phakic and aphakic controls.
- To investigate potential factors influencing visual field constriction in pseudophakia.
Main Methods:
- Goldmann perimetry was utilized for visual field testing.
- Three groups were studied: pseudophakic subjects (n=11), age-matched phakic subjects, and aphakic subjects wearing rigid gas permeable contact lenses.
Main Results:
- Pseudophakic subjects exhibited generally constricted I-3 and I-4 visual fields compared to the phakic control group.
- The degree of constriction suggests media clarity may be less critical than previously assumed.
Conclusions:
- Visual field constriction in pseudophakic individuals may be influenced by peripheral retinal changes.
- Intraocular lens material properties affecting contrast sensitivity could also play a role.