title: A pilot study of the value of prism adaptation in planning strabismus reoperations.
abstract: OBJECTIVE
  To evaluate the value of prism adaptation in planning strabismus reoperations.
  
  
  METHODS
  Of 15 patients with persistent strabismus, 9 underwent prism adaptation prior to strabismus reoperation and 6 underwent strabismus reoperation without preoperative prism adaptation. Corrective surgery was performed on the same or new muscles. Follow-up ranged from 3 months to 2 years. A horizontal deviation of 10 prism diopters or less was considered a successful outcome. Statistical analysis of the results was done.
  
  
  RESULTS
  Of the 9 patients who had prism adaptation, 3 (33%) were responders and 6 (67%) were nonresponders. A successful outcome was achieved in 6 patients (67%) who had prism adaptation and 3 patients (50%) who did not. The difference between groups was statistically insignificant (P > .05).
  
  
  CONCLUSIONS
  These results suggest that the benefits of prism adaptation are not significant enough to justify the time consumption and expenses of this test when planning strabismus reoperations, but a larger group of patients should be studied.
authors.affiliation: Cairo University Hospitals, Cairo, Egypt.
authors.forename: Rehab R
authors.initials: RR
authors.lastname: Kassem
mesh_terms: D000221:Adaptation, Ocular; D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003941:Diagnostic Techniques, Ophthalmological; D005139:Eyeglasses; D005260:Female; D006801:Humans; D008297:Male; D009801:Oculomotor Muscles / Q000473:pathology / Q000601:surgery*; D013508:Ophthalmologic Surgical Procedures; D010865:Pilot Projects; D012086:Reoperation; D013285:Strabismus / Q000175:diagnosis* / Q000601:surgery*; D015348:Vision, Binocular