The authors aimed to compare the long-term surgical outcomes of one vs two muscle surgery in 89 patients with horizontal strabismus of small to moderate angle (<25PD). This was a retrospective study with a minimum six-month follow-up period. One muscle surgery (group 1) was undertaken in 17 (mean age 14.12 ±9.30 years) and two muscles (group 2) in 72 cases (mean age 11.70 ±11.30 years). There were no significant differences in groups for age, gender, visual acuity, angle of deviation and presence of amblyopia. Refractive error was significantly higher in group 1 but was non-significant after adjustment for previous surgeries. At final follow-up, there was no significant difference between groups for refraction, visual acuity and angle of deviation, with similar follow-up periods for both groups. Similar surgical success rates were found for small vs larger deviations, or whether esotropia or exotropia. Overall, results were comparable and long-term surgical success was 70.60% for group 1, and 68.10% for group 2. These results suggest one muscle surgery is as safe and effective for small angle horizontal strabismus as two muscle surgery.
One vs two muscle surgery results for small / moderate angle horizontal strabismus
Reviewed by Fiona Rowe
Long-term surgical outcomes of one-muscle vs two-muscle horizontal strabismus surgery.
CONTRIBUTOR
Fiona Rowe (Prof)
Institute of Population Health, University of Liverpool, UK.
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