title: [Radial optic neurotomy for severe central retinal vein occlusion: preliminary results].
abstract: OBJECTIVE
  To describe the results of radial optic neurotomy for the treatment of severe central retinal vein occlusion.
  
  
  METHODS
  Prospective noncomparative single-center study. Analysis of ten eyes of ten consecutive patients whose visual acuity was 0.1 or less. They underwent fluorescein angiography, visual field testing by automated perimetry, and macular thickness analysis by optical coherence tomography preoperatively at 3 months and at 6 months postoperatively.
  
  
  RESULTS
  Mean visual acuity on an ETDRS chart increased from 30+/-12 points preoperatively to 42+/-15 points at the 3-month visit, (p=0.03), and mean macular thickness decreased from 580+/-150 micro m to 361+/-52 micro m (p=0.04). All patients had clinical improvement as determined by fundus examination and fluorescein angiography. An improvement in the central visual field was observed in all eyes. Mean visual acuity of the five patients followed-up for 6 months was 52.8+/-20 points. No visual loss was observed. None of the patients underwent laser photocoagulation or has presented with neovascularization so far. Optociliary veins developed in three eyes and a retinochoroidal anastomosis within the disk incision was observed in two eyes.
  
  
  CONCLUSIONS
  These preliminary results are encouraging when compared to the reported natural progression of severe central retinal vein occlusion. A bypass of the site of occlusion is a possible mechanism for radial optic neurotomy. A randomized study should be conducted to assess the efficacy of radial optic neurotomy and determine the best candidates for surgery.
authors.affiliation: Département de Chirurgie Vitréo-Rétinienne, Clinique Sourdille, 8, rue Camille Flammarion, 44000 Nantes.
authors.forename: J-F
authors.initials: JF
authors.lastname: Le Rouic
authors.forename: F
authors.initials: F
authors.lastname: Becquet
authors.forename: X
authors.initials: X
authors.lastname: Zanlonghi
authors.forename: P
authors.initials: P
authors.lastname: Péronnet
authors.forename: C
authors.initials: C
authors.lastname: Pousset-Decré
authors.forename: E
authors.initials: E
authors.lastname: Hermouet-Leclair
authors.forename: D
authors.initials: D
authors.lastname: Ducournau
mesh_terms: D000368:Aged; D005260:Female; D005451:Fluorescein Angiography; D005500:Follow-Up Studies; D005901:Glaucoma / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009900:Optic Nerve / Q000601:surgery*; D012170:Retinal Vein Occlusion / Q000601:surgery*; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome; D014792:Visual Acuity