Result of Unilateral Medial Rectus Recession in Moderate Angle Esotropia

ABSTRACT

We analysed the results of residual esotropia with deviation of 15 to 35 prism diopters after a full correction with bimedial rectus recession and unilateral medial rectus recession. The remained mean deviation at postoperative 2 months was 6.17 prism diopters in unilateral MR recession group and 4.23 prism diopters in BMR recession group. The success rates were 75% in unilateral MR recession group and 87% in BMR recession group at postoperative 2 months, 56% in unilateral MR recession group and 89% in BMR recession group at postoperative 6 months. The difference of success rates in two groups at 2 months is not significant statistically but the success rate of BMR recession group at 6 months was higher than that of unilateral MR recession group significantly. There were no significant differences in success rate and residual deviation between the groups of nonaccomodative, partially accomodative esotropia, and all esotropias under 20 prism diopters. In conclusion, unilateral MR recession is considered as very useful surgical procedure in all kinds of esotropia under 20 prism diopters. But further study in the moderate degree esotropia over 20 prism diopters is need.