title: Optic disk analysis with heidelberg retina tomography in patients with branch retinal vein occlusion.
abstract: OBJECTIVE
  To investigate the optic disk topography parameters of patients with branch retinal vein occlusion (BRVO) in a controlled study by using Heidelberg retinal tomography.
  
  
  METHODS
  This prospective study included 35 eyes of 30 patients with BRVO who were followed-up at the Retina Clinic of the Ankara Ulucanlar Eye Education and Research Hospital, and 30 normal subjects (60 eyes). All patients and control subjects underwent complete ophthalmologic evaluation. The optic nerve heads of all subjects were imaged with the Heidelberg retinal tomography III (software 3.01a-M). The following stereometric parameters were calculated for each patient: disk area, cup area, cup-to-disk ratio, rim area, cup volume, rim volume, mean cup depth, maximum cup depth, and cup shape measure. Differences between the two groups were evaluated by the nonparametric independent sample t-test.
  
  
  RESULTS
  The mean cup volume, rim volume, cup area, disk area, rim area, and cup depth in BRVO group were found to be statistically significantly smaller than those in the control group (P < 0.05). Significant differences in the same parameters were also noted between the unaffected and affected eyes in patients with BRVO (P < 0.05). No significant differences were found between the groups in terms of the other stereometric parameters (P > 0.05).
  
  
  CONCLUSIONS
  Based on the results that were obtained in this series, a relationship was found between BRVO and various optic disk topography parameters determined by Heidelberg retinal tomography. Anatomical features of the optic disk may play a role in the pathogenesis of BRVO.
authors: SB Ankara Ulucanlar Eye Education and Research Hospital, Ankara, Turkey. mcitirik@hotmail.com
authors: Mehmet
authors: M
authors: Citirik
authors: Kenan
authors: K
authors: Sonmez
authors: Tulay
authors: T
authors: Simsek
authors: Metin
authors: M
authors: Unal
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D048909:Diabetes Complications; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D006801:Humans; D006973:Hypertension / Q000150:complications; D007834:Lasers; D008297:Male; D008875:Middle Aged; D009412:Nerve Fibers / Q000473:pathology; D009898:Optic Disk / Q000473:pathology*; D011446:Prospective Studies; D012165:Retinal Ganglion Cells / Q000473:pathology; D012170:Retinal Vein Occlusion / Q000175:diagnosis* / Q000209:etiology; D012307:Risk Factors; D014054:Tomography; D014792:Visual Acuity / Q000502:physiology