Retinal Blood Flow and Macular Edema After Radial Optic Neurotomy for Central Retinal Vein Occluion

Purpoe To determine the effect of radial optic neurotomy (RON) on retinal blood flow (RBF) and macular edema in eye with a central retinal vein occluion. Deign Propective interventional tudy. Method even eye of even patient with central retinal vein occluion underwent RON and vitrectomy and were followed for at leat 6 month. The RBF wa calculated from dye dilution curve of video fluorecein angiogram. The foveal thickne wa determined by optical coherence tomography. Reult At 1 week after urgery, the RBF wa ignificantly reduced from 28.5 ± 5.4 to 21.1 ± 6.6 pixel2/ (P < .01). At 6 month after urgery, the RBF (26.0 ± 7.7 pixel2/) wa not ignificantly different from the preoperative RBF, although chorioretinal anatomoe were found in all even eye. The foveal thickne wa ignificantly decreaed from 711 ± 271 to 488 ± 182 μm (P = .03). The potoperative viual acuity wa better than the preoperative viual acuity by two or more line in three out of even eye, and wa wore in two eye. Concluion Neither RON nor chorioretinal anatomoe improved the RBF but macular edema wa improved. Thee finding ugget that removal of the vitreou could reduce macular edema a in diabetic macular edema. However, we cannot exclude the poibility that the change repreent the natural coure of thi dieae.