Functional prognosis in A and V patterns: a retrospective analysis of surgery on oblique muscles.

Treatment of A and V patterns through surgery on the overacting oblique muscles was evaluated. A retrospective analysis of 330 operated cases with A and V patterns was performed. Surgery on the overacting oblique muscles proved to be successful in treating the vertical incomitance in these patterns, especially after the introduction of maximal recession of the inferior oblique muscle in cases with marked V patterns that used to show undercorrections with the usual 8-mm recession. Little was found in the literature about the binocular vision in these patterns. We therefore evaluated cases with special regard to the functional point of view. We found that about one-third of the patients had had simultaneous perception preoperatively and that more than two-thirds did so postoperatively.