title: Stereoacuity following LASIK.
abstract: OBJECTIVE
  To evaluate the effect of laser in situ keratomileusis (LASIK) on stereoacuity (SA).
  
  
  METHODS
  This prospective study includes 200 patients scheduled for LASIK. SA was evaluated preoperatively and one week, one month and three months postoperatively using the Random Dot test. Patients with preoperative SA worse than 480 sec/arc were excluded from the study.
  
  
  RESULTS
  The study included 138 female (69%) and 62 male (31%) subjects. Spherical equivalent was -0.5 to -12.0 D. Mean preoperative SA was 124.80±124.64 (range 480-15) sec/arc which deteriorated to 138.30±126.48 sec/arc one week after surgery (P=0.158) but improved to 111.30±112.15 sec/arc (P=0.002) one month and 103.65+112.20 sec/arc (P=0.001) three months postoperatively. Overall, stereoacuity decreased in 9.5%, increased in 32.5% and remained unchanged in 58% of patients (P=0.007). Patients with anisometropia had worse SA; eventually, SA increased in 5 non-amblyopic anisometropic patients.
  
  
  CONCLUSIONS
  Despite the overall improvement in mean SA after LASIK, a minority of patients experienced decreased SA. Anisometropic patients without amblyopia seem to have a chance for improved SA after LASIK.
authors.affiliation: Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Hassan
authors.initials: H
authors.lastname: Razmjoo
authors.forename: Mohammad-Reza
authors.initials: MR
authors.lastname: Akhlaghi
authors.forename: Ali-Reza
authors.initials: AR
authors.lastname: Dehghani
authors.forename: Ali-Reza
authors.initials: AR
authors.lastname: Peyman
authors.forename: Mohammad
authors.initials: M
authors.lastname: Sari-Mohammadli
authors.forename: Hooman
authors.initials: H
authors.lastname: Ghatreh-Samani