Experience with photocoagulation in Behcet's disease. Between 1973 and 1987 we examined both eyes of 300 patients with the uveoretinitis-type lesions characteristic of Behcet's disease. Of the 556 eyes whose fundus could be examined, 38 eyes (6.8%) in 33 patients (11%) had developed retinal capillary nonperfusion, branch retinal vein occlusion, or retinal or disc neovascularization. These eyes were treated by photocoagulation, primarily to forestall vitreous hemorrhage and the development of neovascular glaucoma, as well as to decrease the macular edema resulting from vein occlusion. The treatment, which was well tolerated, was successful in closing retinal capillary nonperfusion areas and eliminating retinal neovascularization. Disc neovascularization was resolved completely in some cases, and partially in others. 