title: Chorioretinal anastomosis after radial optic neurotomy for central retinal vein occlusion.
abstract: OBJECTIVE
  To evaluate the incidence of chorioretinal anastomosis after radial optic neurotomy and to determine its effect on visual acuity and foveal thickness in patients with central retinal vein occlusion.
  
  
  METHODS
  We conducted a prospective, uncontrolled, interventional study of 14 patients with preoperative visual acuities below 20/125. Pars plana vitrectomy and radial optic neurotomy were performed. Fluorescein angiography and optical coherence tomography were used to monitor the evolution of macular edema.
  
  
  RESULTS
  All patients underwent radial optic neurotomy with no major complications. Eight patients (57.1%) gained 1 or more lines of visual acuity while the visual acuity of 6 patients (42.9%) improved by 2 or more lines (mean visual acuity, 20/80; P<.001) (mean visual acuity gain, 3 lines). The decrease in macular thickness was shown to be statistically significant (P<.001) (median, 282 microm). Retinochoroidal shunts developed in 6 eyes (42.9%) at the site of the radial optic neurotomy.
  
  
  METHODS
  Improvement in visual acuity and a decrease in foveal thickness seen on optical coherence tomography.
  
  
  CONCLUSIONS
  Surgical decompression of central retinal vein occlusion via radial optic neurotomy seems to be a promising technique that improves or at least stabilizes the course of severe central retinal vein occlusion. Improvement may occur because of optic nerve decompression, vitrectomy, and by inducing new chorioretinal shunts that drain retinal circulation to the choroid and accelerate resolution of retinal edema.
authors.affiliation: Vall d'Hebrón Hospital, Universidad Autónoma de Barcelona, and the Instituto de Microcirugía Ocular, Barcelona, Spain. 17215jga@comb.es
authors.forename: Josée
authors.initials: J
authors.lastname: García-Arumíi
authors.forename: Anna
authors.initials: A
authors.lastname: Boixadera
authors.forename: Vicente
authors.initials: V
authors.lastname: Martinez-Castillo
authors.forename: Reinaldo
authors.initials: R
authors.lastname: Castillo
authors.forename: Antonio
authors.initials: A
authors.lastname: Dou
authors.forename: Borja
authors.initials: B
authors.lastname: Corcostegui
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000714:Anastomosis, Surgical; D002829:Choroid / Q000098:blood supply*; D003097:Collateral Circulation / Q000502:physiology; D019299:Decompression, Surgical; D005260:Female; D005451:Fluorescein Angiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D009898:Optic Disk / Q000503:physiopathology / Q000601:surgery*; D009900:Optic Nerve / Q000503:physiopathology / Q000601:surgery*; D011446:Prospective Studies; D012169:Retinal Vein / Q000601:surgery*; D012170:Retinal Vein Occlusion / Q000503:physiopathology / Q000601:surgery*; D014792:Visual Acuity; D014821:Vitrectomy