Effect of Extraocular Muscle Surgery on Corneal Topography

Sergio Kwitko, Mark R. Sawusch, Peter J. McDonnell, David C. Gritz, Hamilton Moreira, David Evensen

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


A computerized videokeratoscopy system was used to evaluate changes in corneal topography after muscle surgery in 36 eyes of 18 rabbits. Topographic analysis revealed a significant flattening of the cornea in the superior and supero-temporal octants after superior rectus recession (mean±SE, -1.78±0.16 diopters) compared with control eyes undergoing a sham procedure (-0.17±0.18 D; P<.05). Excision of all rectus muscles caused a generalized corneal flattening (-1.42±0.13 D; P<.001). A computerized, finite element model of the globe, including the rectus muscles, demonstrated corneal deformation as a result of extraocular muscle tension; recession of an extraocular muscle in this model caused corneal flattening in the quadrant of the recessed muscle. These data suggest that corneal topography is affected by extraocular muscle tension, corroborating clinical reports of refractive change after strabismus surgery.

Original languageEnglish (US)
Pages (from-to)873-878
Number of pages6
JournalArchives of Ophthalmology
Issue number6
StatePublished - Jun 1991
Externally publishedYes

ASJC Scopus subject areas

  • Ophthalmology


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