[Mixed glaucoma--a separate entity?].

The author affirms the existence of the mixed forms of glaucoma, starting from the glaucoma classification according to the gonioscopic criterium. He shows that this classification is based on the anatomic constitution and the angle cannot be open and closed at the same time. The so-called mixed glaucomas are, in fact, either different evolution stages of one of the two forms admitted or secondary glaucomas.