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Study: Dose for intermittent exotropia from largest angle measured

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A strategy of surgical dosing for intermittent exotropia based on the largest angle ever measured did not result in overcorrections and is believed to be safe, according to a study.

C. Kim and J.-M. Hwang at Seoul National University prospectively studied 33 patients with intermittent exotropia in whom angles of misalignment at distance or near showed a difference of 15 prism diopters (PD) or more among visits. All patients underwent bilateral lateral rectus recession and were followed for at least 6 months.

The short-term average result at 1 week after surgery was 9.3 PD esotropia at distance. The long-term average result at either the 6 or 9 month follow-up was 4.8 PD exotropia at distance. At the final follow-up, no overcorrection more than 2 PD esophoria at distance was found.

The study is published in the June issue of Eye.