[Secondary glaucoma mechanisms (author's transl)].
A new classification of the glaucomas concerned with the mechanisms of the intraocular pressure rise is presented. We differentiate hyperproduction and outflowblock glaucomas. The latter are divided into pre-, intra- and postrabecular forms. It is stressed that a gonioscopically open angle can be hydrodynamically closed and vice versa. This classification is based on the anatomical location of the outflow blockage and not on the gonioscopic impression.