Abstract

To describe and report the results of a zip-up modification for loop myopexy for facilitating a muscle union procedure in heavy eye syndrome. A retrospective chart review was conducted on patients with heavy eye syndrome in whom the modified surgical technique was performed. Superior and lateral rectus muscle bellies were approximated using a suture 4 to 5 mm from the muscle insertion. Muscles were then zipped together by 5-0 polyester sutures placed in an anteroposterior direction using a hand-over-hand technique. Details of the surgical technique were reported. Ductions, versions, and angles of strabismus were evaluated before and after surgery. Complications were reported. A total of 8 patients were identified (mean age: 60.8 ± 7 years). Mean axial length was 33.2 ± 1.2 mm. Mean preoperative horizontal and vertical angles of deviation were 78 ± 20 prism diopters (PD) (range: 50 to 120 PD) and 34 ± 4 PD (range: 30 to 40 PD), respectively. Preoperative limitation of abduction and elevation was -4 to -5 in all patients. An average of seven to eight sutures were used. No intraoperative complications were reported. In 7 patients, both vertical and horizontal angles of deviation were reduced to within 8 PD from orthophoria and limitation of ductions was reduced to null or -1 after surgery. Undercorrection occurred in 1 patient with bilateral heavy eye syndrome who had unilateral surgery. No recurrences developed over a median of 6 months of follow-up. A zip-up modification for loop myopexy can facilitate the surgical procedure to achieve a satisfactory outcome in heavy eye syndrome. [J Pediatr Ophthalmol Strabismus. 20XX;X(X):XXX-XXX.].

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