Xenon arc panretinal photocoagulation for central retinal vein occlusion: a randomised prospective study.

Abstract

SUMMARY Thirty-three patients with central retinal vein occlusion were evaluated for the effects of scatter xenon arc panretinal photocoagulation. Thirty-four eyes (2 eyes of 1 patient) were randomly divided into a treatment (15 eyes) and a nontreatment group (19 eyes). The average follow-up per eye has been 29 months. The visual prognosis was not significantly better in either group. There was no difference in the development of fundus neovascularisation between groups. None of the patients in the treated group developed rubeosis or neovascular glaucoma. Two patients in the nontreatment group initially had rubeosis and 3 developed it after entry. All 5 involved eyes developed neovascular glaucoma. A significantly greater amount of central retinal capillary drop-out was present in the untreated eyes that developed rubeosis than those untreated eyes which did not. The eyes in the treated group had a similar range of capillary drop-out area, but none of these eyes developed rubeosis or neovascular glaucoma. Panretinal photocoagulation prevented the development of rubeosis and neovascular glaucoma in susceptible eyes.

A randomised prospective study on treatment of central retinal vein occlusion by isovolaemic haemodilution and photocoagulation.

“…The resulting increase in local blood viscosity certainly strengthens the vicious circle that may ultimately produce progressive ischaemic capillaropathy. (2) In two laboratories patients with CRVO have been shown to have higher than normal whole blood and plasma viscosity values. '2 '3 Studies on cerebral and retinal blood flow have reported an increase in blood flow when whole blood viscosity was reduced by haemodilution.…”

Effect and Compatibility of Isovolaemic Haemodilution in the Treatment of Ischaemic and Non-ischaemic Central Retinal Vein Occlusion

“…The vein occlusions have therefore been categorised at least into two different entities [1][2][3][4][5][6]. This division into is chaemic and non-ischaemic CRVO seems clin ically useful, as the most serious complication, i.e.…”

Efficacy of Panretinal Photocoagulation in Central Retinal Vein Occlusion

“…Previous studies have reported on the effi cacy of panretinal photocoagulation in the prevention of ocular neovascularization [3,4]. In a series of 100 consecutive cases of ischemic central retinal vein occlusion re ported by Magargal et al [3], none of the eyes treated with panretinal photocoagulation de veloped neovascular glaucoma unless an other ischemic event occurred.…”