Long-term follow-up of treated open-angle glaucoma.

We observed 16 eyes of ten glaucoma patients for a mean of 17 years (range, eight to 42 years). Each patient had typical glaucomatous damage to the optic disk and visual field. In most cases, decrease in intraocular pressure prevented further damage over extended periods. Our data reinforces the importance of intraocular pressure reduction in preventing visual loss in glaucoma.