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M. Nakajima, Y. Yamazaki, M. Yamamoto, M. Kawashima; Evaluation of Radial Optic Neurotomy for Central Retinal Vein Occlusion, a Color Doppler Imaging Investigation . Invest. Ophthalmol. Vis. Sci. 2005;46(13):4031.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To evaluate the effect of radial optic neurotomy (RON) on hemodynamics in patients with central retinal vein occlusion (CRVO) using Color Doppler imaging (CDI). Methods: Four eyes of four patients with CRVO were studied (3 males and 1 female, age range 67–77 years). The nasal portion of the optic disc was punctured using a CRVO knife after vitrectomy. Within one week before surgery, and at 1 and 3 months after surgery, optical coherence tomography (OCT) and CDI were performed. Retinal thickness and retinal circulation were calculated by OCT and CDI, respectively. The fellow, untreated eye served as a control. Results: No chorioretinal anastomosis developed at the RON site in any of the four patients. In all eyes undergoing RON, at three months after surgery, macular thickness was reduced (range, 63–81%), the resistive index (RI) in the central retinal artery was reduced (range, 4–16%) and minimum velocity (Vmin) in the central retinal artery had improved (range, 1.5–211%) as compared to before surgery. In fellow eyes, there were no changes in RI or Vmin before versus after surgery. Conclusions: Our results suggest that RON in CRVO can improve retinal circulation and cystoid macular edema.
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