Bilateral Medial Recti Recession in Infantile Esotropia

ABSTRACT

Twenty-seven patients with congnital esotropia underwent bilateral medial recti recessions and were follwed up for 6 months or more. The relationship between the amount of bilateral medial rectus recession, the pre- and postoperative alignment was analyzed. The success of sugery was defined from the undercorrection less than 10 prism diopter(PD) to the overcorrection less than 5PD. Nineteen of 27 patients(70.3%) were successful. 3 patients(11.1%) were undercorrected and five(18.5%) were overcorrected. Three patients who showed overcorrection more than 20PD were recessed 7mm or more. The standard deviation of postoperative alignment was 2.2 in patients with preoperative alignment less than 50PD, and 17.4 in those with 50PD or more. The difference was significant(p<0.05). When preoperative alignment was 25 to 55PD and the amount of surgery was 4 to 7mm, there was high linear correlation between the amount of surgery and the corrected angle. However, close observation for consecutive exotropia will be necessary when preoperative alignment is more than 50PD and the amount of recession is more than 7mm.