[Dynamics of vascular changes in neovascular glaucoma. I. Development of rubeosis iridis after cryosurgery]

The author is evaluating the influence of two cryosurgical methods for the development of the rubeosis of iris in neovascular glaucoma. The cyclocryocoagulation was used as a single method in 12 eyes, the combination of transscleral panretinal cryocoagulation and cyclocryocoagulation in 26 eyes. The results were clearly better if the combination of cryosurgical methods was used. The involution of rubeosis of iris was observed in 6 weeks in all patients after the transscleral panretinal photocoagulation in combination with cyclocryocoagulation. The author thinks that the non-satisfactory regression of the rubeosis in neovascular glaucoma after simple cyclocryocoagulation is caused by the fact, that by this method we affect just one factor in the pathogenesis of rubeosis. The author is suggesting that there are two factors influencing the pathogenesis of the rubeosis of iris: the primary disease, that is causing the development of proliferative retinopathy; and the high intraocular pressure, that is reducing the blood flow in retinal vessels and by this is increasing the hypoxia of the retina.