STEREOPSIS AFTER SURGERY FOR DIFFERENT-TYPE CONSTANT EXOTROPIA

Objective To investigate the long-term stereopsis result after surgery for intermittent exotropia and constant exotropia. Methods A retrospective analysis was done in clinical data of 124 patients with intermittent exotropia or constant exotropia who underwent surgery for strabotomy.Of whom,there were 64 with intermittent exotropia(group A),36 with constant exotropia with a previous intermittent history(group B),and 24 with constant exotropia without a previous intermittent history(group C).The postoperative residual strabismus and stereopsis were compared among the three groups. Results There were no significant differences among the three groups with regard to success rate of correction of eye position(P0.05).The differences among the three groups in terms of postoperative binocular vision and normal distant stereopsis were significant(χ2=56.523,15.039;P0.05),in which,the success rate in group A was higher than groups B and C,and the difference between group B and group C was not significant(P0.05).The difference of rough stereopsis between groups 1and 2was not significant,but both of them were than than that of group 3(χ2=27.792,P0.05). Conclusion Patients with constant exotropia who have a history of intermission will have a better postoperative long-term recovery of rough stereopsis than those without,and the recovery of binocular vision and distant stereoacuity was better as well.