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LASIK improved stereopsis in adult patients with anisometropia

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ORLANDO, Fla. — LASIK surgery improved stereopsis in adults with anisometropia or subnormal stereopsis, according to a poster presentation here.

“The potential benefit of LASIK on the stereopsis of these patients has not been well described. … [We have found] the improvement may be dramatic,” Scott E. Olitsky, MD, and co-authors reported at the American Association for Pediatric Ophthalmology and Strabismus meeting. The authors presented a study of 30 patients between the ages of 18 and 48 years who underwent LASIK surgery to address their anisometropia.

The patients had anisometropia of 3 D or more, up to 13.75 D, before surgery. Stereopsis ranged from 80 seconds of arc to none, the study authors reported. After surgery, all patients had an anisometropic difference of less than 1 D. Twenty-seven patients showed improved stereopsis, ranging from 40 to 400 seconds of arc. The other three patients had no stereopsis preoperatively and remained stable after surgery.

While their results were promising, the study authors said, further study is warranted in a larger population to validate the results.