SECONDARY EXOTROPIA - A RETROSPECTIVE ANALYSIS OF MATCHED CASES

Secondary exotropia, that is exotropia following surgery for esotropia , remains frustratingly common, even among experienced strabismologist s. In this study, we have compared a group of secondary exotropia case s with a matched group of cases of residual esotropia. Of the factors analyzed, only the presence of an A- or V-pattern preoperatively (P = .0077), the presence of limited postoperative adduction (P < .001), an d postoperative binocular function (P = .0073) identified the secondar y exotropes. The presence of reduced adduction postoperatively in subj ects with secondary exotropia was a poor prognostic sign with 11 of th e 13 cases requiring further surgery for poor cosmesis. The authors su ggest two subclassifications of secondary exotropia.