title: Radial optic neurotomy in central retinal vein occlusion does not influence ocular hemodynamics.
abstract: OBJECTIVE
  radial optic neurotomy (RON) is used for the treatment of central retinal vein occlusion. Its effects on visual acuity differ substantially between patients. Our study aims to evaluate if RON has an impact on ocular microcirculation and if analysis of ocular microcirculation might serve as a predictor for surgical success.
  
  
  METHODS
  a complete ophthalmologic examination including color Doppler imaging of the retrobulbar vessels was performed before and 2-4 months after RON in 12 patients.
  
  
  RESULTS
  mean visual acuity was 0.09 ± 0.03 prior to and 0.24 ± 0.12 after RON. Visual acuity improved in 7 (+3.5 ± 0.9 lines), was stable in 3 (± 0 lines) and worsened in 2 cases (-6 and -2 lines). Doppler parameters were not affected by RON, and no correlations between visual acuity and perfusion parameters were found.
  
  
  CONCLUSIONS
  Our data indicate that RON does not influence ocular microcirculation. None of the assessed hemodynamic parameters appears to be a predictor for surgical success.
authors.affiliation: Klinik und Poliklinik für Augenheilkunde, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Deutschland. skevaschris @ yahoo.gr
authors.forename: Christos
authors.initials: C
authors.lastname: Skevas
authors.forename: Lars
authors.initials: L
authors.lastname: Wagenfeld
authors.forename: Matthias
authors.initials: M
authors.lastname: Feucht
authors.forename: Peter
authors.initials: P
authors.lastname: Galambos
authors.forename: Gisbert
authors.initials: G
authors.lastname: Richard
authors.forename: Oliver
authors.initials: O
authors.lastname: Zeitz
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001783:Blood Flow Velocity; D019299:Decompression, Surgical / Q000379:methods; D005260:Female; D005451:Fluorescein Angiography; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D013508:Ophthalmologic Surgical Procedures; D009898:Optic Disk / Q000601:surgery*; D009900:Optic Nerve / Q000601:surgery*; D012161:Retinal Artery / Q000502:physiology*; D012170:Retinal Vein Occlusion / Q000175:diagnosis / Q000503:physiopathology* / Q000601:surgery*; D018615:Ultrasonography, Doppler, Color; D014792:Visual Acuity / Q000502:physiology; D014821:Vitrectomy