title: Comparison of surgically induced astigmatism in patients with horizontal rectus muscle recession.
abstract: OBJECTIVE
  To compare surgically induced astigmatism (SIA) following horizontal rectus muscle recession surgery between suspension recession with both the "hang-back" technique and conventional recession technique.
  
  
  METHODS
  Totally, 48 eyes of 24 patients who had undergone horizontal rectus muscle recession surgery were reviewed retrospectively. The patients were divided into two groups. Twelve patients were operated on by the hang-back technique (Group 1), and 12 by the conventional recession technique (Group 2). SIA was calculated on the 1(st) wk, 1(st) and in the 3(rd) mo after surgery using the SIA calculator.
  
  
  RESULTS
  SIA was statistically higher in the Group 1 all postoperative follow-up. SIA was the highest in the 1(st) wk, and decreased gradually in both groups.
  
  
  CONCLUSIONS
  The suspension recession technique induced much more SIA than the conventional recession technique. This difference also continued in the following visits. Therefore, the refractive power should be checked postoperatively in order to avoid refractive amblyopia. Conventional recession surgery should be the preferred method so as to minimize the postoperative refractive changes in patients with amblyopia.
authors.affiliation: Department of Ophthalmology, Adnan Menderes University Medical Faculty, Aydin 09100, Turkey.
authors.forename: Harun
authors.initials: H
authors.lastname: Cakmak
authors.affiliation: Department of Ophthalmology, Adnan Menderes University Medical Faculty, Aydin 09100, Turkey.
authors.forename: Tolga
authors.initials: T
authors.lastname: Kocatürk
authors.affiliation: Department of Ophthalmology, Adnan Menderes University Medical Faculty, Aydin 09100, Turkey.
authors.forename: Sema Oruç
authors.initials: SO
authors.lastname: Dündar
keywords: horizontal rectus; recession; surgically induced astigmatism