A modified goniotomy (trabeculodialysis) was performed on 30 eyes of 23 patients with secondary glaucoma due to chronic anterior uveitis. All but two patients also suffered from juvenile chronic arthritis (Still's disease, juvenile rheumatoid arthritis). Trabeculodialysis was unsuccessful in lowering intraocular pressure to below 21 mmHg in 12 (40%) of eyes and successful in 18 (60%) of eyes. Of the 18 successful cases, 5 required no additional medication, but in 13 cases the intraocular pressure could only be maintained at a normal level by concomitant anti-glaucoma therapy. The presence of aphakia, extent of preoperative angle closure, and patient's age had no bearing on the outcome.