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The +10 diopter lens occluder.
N Benegas1, B J Kushner, G V Morton
1Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, WI 53705, USA.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|August 2, 2000
Summary
A +10 diopter lens allows clear visualization of the eye during cover tests, providing strabismus measurements similar to opaque occluders. This method is effective for assessing eye alignment.
Area of Science:
- Ophthalmology
- Vision Science
Background:
- The cover test is crucial for diagnosing strabismus.
- Visualizing the eye during the cover test is often challenging.
- A +10 diopter lens may serve as an effective occluder for improved visualization.
Purpose of the Study:
- To evaluate the efficacy of a +10 diopter lens as an occluder during the cover test.
- To compare measurements of strabismus obtained using a +10 diopter lens versus a standard opaque occluder.
Main Methods:
- Strabismus angles were measured in 65 patients with various forms of strabismus.
- Measurements were taken using both a +10 diopter lens and an opaque occluder.
- Findings from both occluder types were compared for agreement.
Main Results:
- Excellent visualization of the dissociated eye was achieved through the +10 diopter lens in all patients.
- Measurements using the +10 diopter lens agreed within 3 prism diopters of the opaque occluder in 64 out of 65 patients.
- One patient showed a 5 prism diopter difference between the two occluders.
Conclusions:
- A +10 diopter lens is a viable alternative to standard occluders for the cover test.
- It offers clear visualization of the dissociated eye.
- Measurements obtained are comparable to those using opaque occluders, aiding in strabismus assessment.