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Y. Hayashi, T. Yokoyama, F. Nomura, K. Shiraki; Long–Term Prognosis of Distance Stereoacuity in Intermittent Exotropia After Strabismus Surgery . Invest. Ophthalmol. Vis. Sci. 2005;46(13):2952.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To investigate long–term prognosis of static distance stereoacuity in intermittent exotropia after strabismus surgery. Methods: One hundred and thirty one patients with intermittent exotropia, who underwent strabismus surgery and whose near and distance stereoacuity were both available, were studied retrospectively. The patients who had had no near stereoacuity before surgery were removed from this study. All subjects have been observed for more than one year after surgery, and the last–examined ages were 6 years old and above. The angle of deviation and near/distance stereoacuity before and after surgery were investigated. Near and distance stereoacuity, near and distance angle of deviation, the age of onset, the age at surgery and the last–examined age were reviewed. The surgery was mainly recession–resection procedure. Results: One hundred four patients (79%) had had no distance stereoacuity before surgery, and the rate was reduced to 47% after surgery. The group which had had no stereoacuity before surgery would be used hereafter. Postoperatively, 76 patients (73%) acquired distance stereoacuity, of whom 67% still kept it at the time of the last examination, and the rest lost it in the postoperative course. Twenty eight patients (27%) never showed distance stereoacuity. Among these groups, the age of onset, the age at surgery and the angle of deviation at distance were not statistically significant. Conclusions: This study showed that only about half patients with intermittent exotropia could acquire and keep static distance stereoacuity after surgery over a long period of time.
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