Z-split myectomy versus 7/8 posterior tenectomy for Brown syndrome

Abstract

Brown syndrome is an extraocular muscle disorder that can cause motility restrictions, diplopia, and alternate head positioning. Multiple surgical techniques have been developed to resolve this problem. One technique, the superior oblique Z-split, lengthens the superior oblique tendon by partial-thickness cuts. Another technique, posterior 7/8 tenectomy, weakens the superior oblique while preserving its torsional action. This study aims to compare the outcomes of both surgeries.