Study on the stereopsis for intermittent exotropia before and after surgical correction and the opportunity of operation

AbstrcatObjectiveTo evaluate the change of stereopsis for intermittent exotropia before and after surgical correction and to investigate the opportunity of operation. MethodsThirtysix cases were divided into 3 groups, 4～7 years, 8～11 years, 12～18 years, with 12 patients in each group. Titmus stereogram and visual evoked potential elicited by dynamic random dot streopsis were tested before and after surgical correction.ResultsAfter surgical correction, the changes of obtaining stereopsis were better than preoperation. Furthermore, the patients of 4～7 years group recovered better than those of the other two groups. ConclusionFrom the point of stereopsis , the surgical correction for intermittent exotropia should be performed early.