The Effect of Advancement of the Lateral Rectus Muscle on the Consecutive Esotropia

ABSTRACT

The operation methods for consecutive esotropia were various according to operators and the standard criteria for the amount of procedure was absent. We investigated the results of 7 patients who underwent advancement of the lateral rectus muscle for consecutive esotropia to estimate the corrected prism diopters per 1mm deviation of the lateral rectus muscle(delta/mm). The mean corrected amount of deviation was 2.01 delta/mm in 370 patients who underwent bilateral rectus muscles recession and 3.89 delta/mm in 7 patients who were brought about consecutive esotropia after recession of bilateral rectus muscles. There was a statistically significant difference between them(P0.05). This result suggests that we should adjust the amount of advancement of the lateral rectus muscle according to the effect of corrected amount by the recession of lateral rectus muscle of the previous surgery.