title: The reduction of A-V patterns with oblique muscles overaction in unilateral and bilateral surgery.
abstract: OBJECTIVE
  A-V strabismus patterns may occur with or without oblique muscles overaction and thus require different surgical approach. The aim of our study was to evaluate the efficacy of unilateral vs bilateral surgery for A and V pattern strabismus in children with oblique muscles overaction.
  
  
  METHODS
  A retrospective review of 45 children with oblique muscles overaction was performed. All children underwent unilateral or bilateral oblique weakening procedures over a period of 2 years. The mean reduction of A-V pattern angle was measured in all groups.
  
  
  RESULTS
  Among the patients with V pattern, treated with unilateral surgery the mean angle reduction was 11.8delta +/- 6.26delta and among those who underwent bilateral procedure it was 17.06delta +/- 8.46delta. In A pattern group the mean angle reduction were 8.0delta +/- 2.82delta and 15.0delta +/- 8.9delta respectively.
  
  
  CONCLUSIONS
  The bilateral oblique weakening procedure is significantly more effective (p < 0.01) in reducing the angle in A-V patterns than the unilateral surgery. It appears that in A pattern with superior oblique overaction the bilateral surgery gives better results than in V pattern with inferior oblique overaction.
authors.affiliation: Department Ophthalmology and Ophthalmology Clinic of Medical University of Łódź. o.m.nowakowscy@neostrada.pl
authors.forename: Olimpia
authors.initials: O
authors.lastname: Nowakowska
authors.forename: Anna
authors.initials: A
authors.lastname: Broniarczyk-Loba
authors.forename: Piotr J
authors.initials: PJ
authors.lastname: Loba
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D009801:Oculomotor Muscles / Q000601:surgery*; D013508:Ophthalmologic Surgical Procedures / Q000379:methods*; D011044:Poland; D012189:Retrospective Studies; D013285:Strabismus / Q000601:surgery*; D016896:Treatment Outcome; D015348:Vision, Binocular