title: Retinal nerve fiber layer thickness in the fellow eyes of normal-tension glaucoma patients with unilateral visual field defect.
abstract: OBJECTIVE
  To quantitatively evaluate retinal nerve fiber layer (RNFL) thickness in the fellow eyes of normal-tension glaucoma (NTG) patients with unilateral visual field defect.
  
  
  METHODS
  Observational case-control study.
  
  
  METHODS
  Twenty-nine NTG patients with unilateral visual field defect were enrolled in this study. All 29 fellow eyes showed normal visual field. Thirty-one normal eyes of 31 subjects served as controls. The RNFL thickness around the optic disk was determined using Fast RNFL thickness (3.4) of optical coherence tomography. Average and segmental (4 quadrants and 12 clock- hours) RNFL thickness measurements were compared among the three groups.
  
  
  RESULTS
  RNFL thicknesses were significantly different among the three groups in the average, superior quadrant (11 and 12 clock-hour segments), and inferior quadrant (6 clock-hour segment) (P = .00, one-way ANOVA and Tukey's tests).
  
  
  CONCLUSIONS
  RNFL thickness reductions are already present in the fellow eyes of NTG patients with unilateral visual field defect.
authors.affiliation: Department of Ophthalmology, Seoul National University Hospital, Korea. dmkim@snu.ac.kr
authors.forename: Dong Myung
authors.initials: DM
authors.lastname: Kim
authors.forename: Uk Suk
authors.initials: US
authors.lastname: Hwang
authors.forename: Ki Ho
authors.initials: KH
authors.lastname: Park
authors.forename: Seok Hwan
authors.initials: SH
authors.lastname: Kim
mesh_terms: D016022:Case-Control Studies; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D005902:Glaucoma, Open-Angle / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009412:Nerve Fibers / Q000473:pathology*; D009898:Optic Disk / Q000473:pathology*; D009901:Optic Nerve Diseases / Q000175:diagnosis*; D012165:Retinal Ganglion Cells / Q000473:pathology*; D041623:Tomography, Optical Coherence; D014786:Vision Disorders / Q000175:diagnosis*; D014794:Visual Fields