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Distance stereoacuity. Assessing control in intermittent exotropia
R A Stathacopoulos1, A L Rosenbaum, D Zanoni
1Department of Ophthalmology, Jules Stein Eye Institute, University of California, Los Angeles 90024.
Ophthalmology
|April 1, 1993
Summary
Distance stereoacuity may offer an objective measure for assessing control in intermittent exotropia. This visual test could aid in surgical decisions for patients with this eye condition.
Area of Science:
- Ophthalmology
- Strabismus Research
- Binocular Vision
Background:
- Current assessment of intermittent exotropia control relies on subjective methods.
- Objective measures for evaluating intermittent exotropia control are lacking.
Purpose of the Study:
- To compare distance stereoacuity between intermittent exotropia patients and normal subjects.
- To investigate distance stereoacuity as an objective measure for intermittent exotropia control.
Main Methods:
- Evaluated near and distance stereoacuity in 44 intermittent exotropia patients and 50 controls.
- Assessed subjective control measures (office, home, light closure) in patients.
- Re-evaluated six post-surgery patients.
Main Results:
- Both groups showed good near stereoacuity.
- Intermittent exotropia patients had significantly poorer distance stereoacuity (P < 0.001).
- Five of six patients with poor preoperative distance stereoacuity showed significant improvement post-surgery.
Conclusions:
- Diminished distance stereoacuity appears to be an objective indicator of poor intermittent exotropia control.
- Distance stereoacuity may provide objective criteria for surgical intervention decisions.
- This objective measure could refine treatment strategies for intermittent exotropia.