title: [The effect of superior oblique recession on the status of ocular torsion].
abstract: OBJECTIVE
  To investigate the effect of superior oblique recession on the status of ocular torsion.
  
  
  METHODS
  Twenty patients (31 eyes ) underwent superior oblique recession for treatment of superior oblique overacting, 11 cases had both eyes involvement while 9 had monocular.Objective cyclotorsion were examined pre-operation, as well as 1, 30, 90 days post-operation with fundus photograph. The photographs were transferred to a computer and then the fovea-disa angle (FDA) was measured by a software for drawing pictures.Subjective cyclotorsion were assessed by double Maddox rod test and synoptophore, while the binocular vision function by Bagolini glasses and Titmus.
  
  
  RESULTS
  For 11 cases of the both eyes involvement, preoperation FDA was 9.50° ± 5.12° in the right eyes, 8.23° ± 3.45° in the left eyes, there was not statistically significant between two eyes(t = 1.12, P = 0.29). For 9 cases of the monocular eye involvement, preoperation FDA was 6.55° ± 4.14° in the affected eyes, 6.85° ± 5.08° in the follow eyes, there was also not statistically significant between two eyes (t = 0.13, P = 0.90). To 11 cases of the both eyes involvement, the combined FDA of preoperation and 1, 30, 90 days after operation were 17.74° ± 7.89° and 7.63° ± 4.28°, 6.05° ± 6.11°, 7.33° ± 6.17° respectively. The comparision of objective ocular cyclotorsion for both eyes showed significant difference pre-and post-operation (F = 8.245, P < 0.01) . To 9 cases of the monocular eye involvement, the combined FDA of preoperation and 1, 30, 90 days after operation were 13.40° ± 6.13° and 5.06° ± 3.99°, 3.59° ± 3.47°, 5.07° ± 3.35° respectively. The comparision of objective ocular cyclotorsion showed significant difference pre-and post-operation (F = 9.351, P < 0.01) .Four patients had subjective cyclotorsion, but it's different with objective cyclotorsion before and after surgery.8 patients' binocular vision function were ameliorated after surgery.
  
  
  CONCLUSIONS
  Recession of overaction superior oblique muscles can correct ocular incyclodeviation effectively.
authors.affiliation: Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Institute, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin 300020, China.
authors.forename: Mingmei
authors.initials: M
authors.lastname: Liu
authors.forename: Jingcong
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Email: weizhang02@yahoo.com.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
mesh_terms: D005584:Fovea Centralis; D006801:Humans; D009801:Oculomotor Muscles / Q000601:surgery*; D013508:Ophthalmologic Surgical Procedures; D010781:Photography; D011184:Postoperative Period; D013285:Strabismus / Q000175:diagnosis / Q000601:surgery*; D013997:Time Factors; D015348:Vision, Binocular