Palpebral fissure changes following horizontal recti muscles surgery

Background Strabismus surgery is a 1-day operation. It can result in aligned eyes or nearly so (orthophoria) or overcorrection or undercorrection that may require further treatment or another surgery. Aim To assess alterations in vertical palpebral fissure height following horizontal recti muscle surgery (recession or resection) for the treatment of horizontal strabismus (esotropia or exotropia). Patients and methods A prospective interventional case series was carried out on 68 eyes of 41 patients with horizontal strabismus (exotropia or esotropia), comitant or incomitant (paralytic), who underwent surgical correction. Patients were subdivided into three groups: group I (n=50) underwent recession only, group II (n=10) underwent resection only, and group III (n=8) underwent recession and resection. All patients were subjected to preoperative, operative, and postoperative evaluations (palpebral fissure height and width measurement). Results Distant angle of exotropia was considerably lower in group I than group III (P2