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S. Lee, S.–D. Kim; Clinical Outcome of Panretinal Photocoagulation(PRP) and Radial Optic Neurotomy(RON) in Central Retinal Vein Obstruction(CRVO) . Invest. Ophthalmol. Vis. Sci. 2005;46(13):4035.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: This study is to estimate effectiveness of RON on patients with CRVO. RON procedure was compared with PRP to provide comparative measurements. Subject & Method: 27 patients(27 eyes) who had been diagnosed CRVO between July, 1994 and October, 2004 was retrospectively reviewed. The subjects were of 53.7 years of age on average, and consisted of 17 females and 10 males. 16 eyes were operated with PRP and 11 eyes were operated with RON. For each treatment group, visual acuity were measured preoperatively and at 1, 2, 3, 6, 12, 18, 24 months postoperatively. Also fundus examination, fundus photography and fluorescein angiography were performed prior to the comparison and analysis of PRP and RON. Results: The follow–up observation period for the study were 42.2 months for the PRP group and 14.7 months for the RON group. For PRP group, the visual acuity prior to operation was 1.4±0.67 on average LogMAR and post–surgery visual acuity was 1.38±0.76 on average LogMAR. For RON group it was 0.94±0.47 and 0.90±0.40 LogMAR respectively. The visual change(preoperative visual acuity – postoperative visual acuity on LogMAR) is shown that RON –0.36±0.33 and PRP –0.19±0.44. In the RON group, 3 eyes(27.27%) showed improvement on visual acuity. 6 eyes (54.55%) showed no change and 2 eyes(18.18%) showed fall in visual acuity. In the PRP group, improvements were observed in 5 eyes(31.25%), 8 eyes(50.00%) showed no change and 3 eyes(18.75%) showed decrease in visual acuity. Conclusions: When visual change was compared from each group, there is no significant statistical difference(P=0.107). RON may not be effective treatment for CRVO. The study is retrospective unrandomized clinical study and only done with limited number of patient.
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