David L Nash1, Sarah R Hatt2, David A Leske2, Laura May3, Erick D Bothun4, Brian G Mohney2, Michael C Brodsky5, Jonathan M Holmes6. 1. Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota; Department of Ophthalmology, Gundersen Health System, La Crosse, Wisconsin. 2. Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota. 3. Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, Minnesota. 4. Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota; Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, Minnesota. 5. Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota; Department of Neurology, Mayo Clinic, Rochester, Minnesota. 6. Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota. Electronic address: holmes.jonathan@mayo.edu.
Abstract
PURPOSE: To compare 1-muscle vs 2-muscle surgery for moderate-angle hyperdeviations owing to presumed unilateral fourth nerve palsy. DESIGN: Retrospective chart review. METHODS: Seventy-three patients (aged 5-86 years) underwent either 1- or 2-muscle surgery at our institution for moderate hyperdeviation owing to presumed unilateral fourth nerve palsy, measuring 14-25 prism diopters (PD) in straight-ahead gaze at distance fixation. Six-week and 1-year motor success was defined as zero vertical deviation or 1-4 PD undercorrection at distance, overcorrection as any reversal of hypertropia, and undercorrection as >4 PD. Diplopia success was defined as no diplopia, or only rarely for distance straight ahead and reading. RESULTS: Twenty-eight patients underwent 1-muscle surgery, and 45 patients underwent 2-muscle surgery. Motor success was similar (64% vs 67%, P > .99 at 6 weeks; 47% vs 55%, P = .8 at 1 year, n = 46), but there were more undercorrections at 6 weeks with 1-muscle surgery (36% vs 16%, P = .09) and more overcorrections at 6 weeks with 2-muscle surgery (0% vs 18%, P = .02). Diplopia success was also somewhat similar between 1- and 2-muscle surgery at 6 weeks (73% vs 60%, P = .5) and 1 year (45% vs 59%, P = .5). CONCLUSION: For moderate-angle hyperdeviations owing to presumed unilateral fourth nerve palsy, there appears no clear advantage of 2-muscle surgery for motor outcomes. Diplopia success was similar between 1- and 2-muscle surgery, owing to a greater number of less symptomatic undercorrections with 1-muscle surgery and a smaller number of more symptomatic overcorrections with 2-muscle surgery.
PURPOSE: To compare 1-muscle vs 2-muscle surgery for moderate-angle hyperdeviations owing to presumed unilateral fourth nerve palsy. DESIGN: Retrospective chart review. METHODS: Seventy-three patients (aged 5-86 years) underwent either 1- or 2-muscle surgery at our institution for moderate hyperdeviation owing to presumed unilateral fourth nerve palsy, measuring 14-25 prism diopters (PD) in straight-ahead gaze at distance fixation. Six-week and 1-year motor success was defined as zero vertical deviation or 1-4 PD undercorrection at distance, overcorrection as any reversal of hypertropia, and undercorrection as >4 PD. Diplopia success was defined as no diplopia, or only rarely for distance straight ahead and reading. RESULTS: Twenty-eight patients underwent 1-muscle surgery, and 45 patients underwent 2-muscle surgery. Motor success was similar (64% vs 67%, P > .99 at 6 weeks; 47% vs 55%, P = .8 at 1 year, n = 46), but there were more undercorrections at 6 weeks with 1-muscle surgery (36% vs 16%, P = .09) and more overcorrections at 6 weeks with 2-muscle surgery (0% vs 18%, P = .02). Diplopia success was also somewhat similar between 1- and 2-muscle surgery at 6 weeks (73% vs 60%, P = .5) and 1 year (45% vs 59%, P = .5). CONCLUSION: For moderate-angle hyperdeviations owing to presumed unilateral fourth nerve palsy, there appears no clear advantage of 2-muscle surgery for motor outcomes. Diplopia success was similar between 1- and 2-muscle surgery, owing to a greater number of less symptomatic undercorrections with 1-muscle surgery and a smaller number of more symptomatic overcorrections with 2-muscle surgery.
Authors: Karen Hendler; Stacy L Pineles; Joseph L Demer; Arthur L Rosenbaum; Guillermo Velez; Federico G Velez Journal: Br J Ophthalmol Date: 2012-11-10 Impact factor: 4.638
Authors: Jonathan M Holmes; Laura Liebermann; Sarah R Hatt; Stephen J Smith; David A Leske Journal: Ophthalmology Date: 2013-03-24 Impact factor: 12.079