title: Rectus muscle transposition surgery.
abstract: Thirty patients had vertical offsets of their horizontal rectus insertions to correct a coexisting vertical deviation while 14 patients had horizontal offsets of their vertical recti to correct a horizontal deviation (total of 44 patients). The average effect of surgery was about 0.5 prism diopters per mm of surgery, both for a vertical or a horizontal effect. This is about half as much as generally reported in the literature, where one prism diopter of effect usually follows each mm of transposition. In our study, a greater effect per mm of surgery was noted with larger associated vertical deviations and larger amounts of vertical transposition of the horizontal rectus muscles.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D009801:Oculomotor Muscles / Q000601:surgery*; D013285:Strabismus / Q000601:surgery*; D014792:Visual Acuity