Objective: Infantile esotropia, a common form of strabismus, is treated either by bilateral recession (BR) or unilateral recession-resection (RR). Differences in degree of alignment achieved by these two procedures have never been examined in a randomised controlled trial.
Design: Controlled, randomised multicenter trial.
Setting: 12 University clinics.
Participants and intervention: We randomly assigned 124 patients to either BR or RR.
Main outcome measure: Alignment assessed as the variation of the postoperative angle of strabismus during alternating cover.
Results: The mean postoperative angle of strabismus at distance was +2.3° (SD±5.1) for BR and +2.9° (SD±3.5) for RR (P=0.46 for reduction of the angle and P=0.79 for the within-group variation). The mean reduction of the angle of strabismus was 1.41 degree per millimetre of muscle displacement (SD±0.45) for RR and 1.47 (SD±0.50) for BR (P=0.85 for reduction of the angle and P=0.22 for the within-group variation). Alignment was associated with postoperative binocular vision (P=0.001) in both groups.
Conclusions: We did not find a statistically significant difference between BR and RR as surgery for infantile esotropia.
Trial registration: Clinical trials NCT 00304577.