Slanted versus conventional bilateral lateral rectus recession in children with convergence insufficiency intermittent exotropia: A multicentre, randomized trial

PURPOSE: To assess the efficacy of slanted bilateral lateral rectus recession (S-BLR) versus conventional bilateral lateral rectus recession (C-BLR) in children with convergence insufficiency intermittent exotropia (CI-IXT). DESIGN: Multicentre, randomized controlled trial. METHODS: Chinese children aged 5-12 years with CI-IXT were consecutively enrolled, and randomly assigned (1:1) to receive either S-BLR or C-BLR. The primary outcome was the 12-month overall success rate, defined as a postoperative residual deviation between 10Δ of exodeviation and 5Δ of esodeviation with near-distance disparity (NDD) < 10Δ. RESULTS: revealed a higher success rate of near deviation (86 % versus 69 %, P = 0.02), and a lower rate of near undercorrection (13 % versus 30 %, P = 0.01) in S-BLR group. Aside from undercorrection and overcorrection, no additional long-term suboptimal surgical outcomes were observed. CONCLUSIONS: , and a longer follow-up are needed to validate these findings.