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Evaluating the visual field effects of blepharoptosis using automated static perimetry
D R Meyer1, J H Stern, J M Jarvis
1Department of Ophthalmology, Albany Medical College, NY 12203.
Ophthalmology
|May 1, 1993
Summary
Automated static perimetry effectively quantifies visual field loss from blepharoptosis (droopy eyelids). Even mild cases significantly depress the superior visual field, impacting vision near fixation.
Area of Science:
- Ophthalmology
- Visual Neuroscience
Background:
- Traditional visual field assessment for blepharoptosis used limited manual kinetic perimetry.
- Automated static full-threshold perimetry offers a more comprehensive evaluation method.
Purpose of the Study:
- To evaluate visual dysfunction caused by blepharoptosis using automated static full-threshold perimetry.
- To quantitate the impact of varying degrees of blepharoptosis on the visual field.
Main Methods:
- Twenty volunteers underwent Humphrey field analyzer testing with a 60-degree static strategy.
- Blepharoptosis was induced using gold weights, and visual fields were tested at baseline and with induced ptosis.
- Threshold sensitivities were measured along eight principal meridians.
Main Results:
- Mild blepharoptosis caused significant depression of superior meridian test points (P < 0.01).
- Moderately severe blepharoptosis showed greater superior meridian depression and also affected horizontal and lower meridians.
- Sensitivity decreases were more pronounced at eccentric points along the superior meridian.
Conclusions:
- Automated static perimetry accurately quantifies visual field loss in blepharoptosis.
- Even mild blepharoptosis can depress the superior visual field, extending near fixation.
- Ophthalmologists should consider blepharoptosis effects during visual field testing for other conditions.