The Factors Affecting Consecutive Exotropia with Angle of 20 Prism Diopters or More following Surgery for Esotropia

ABSTRACT

The purpose of this study is to evaluate the factors that may have a role in the development of postoperative exotropia with the angle of 20 prism diopters (PD) or more. The study group was subdivided into three groups depending on the amount of deviation for consecutive exotropia; group A is the angle of 20PD or more, group B is between 10PD and 18PD, and group C is orthophoria. Comparing group A with C, the presence of amblyopia(p<0.05), postoperative limitation on adduction(p<0.01), postoperative binocular vision(p<0.05) and postoperative A or V pattern(p<0.05) were statistically significant. Among the factors of group A and B, the presence of postoperative limitation on adduction(p<0.05) and refractive error of 3D or more(p<0.05) were signifi cant. We suggest that these factors may have a role to develop large consecutive exotropia, therefore close observation is necessary when these factors are found.