Practically all the tissues of the eye are capable in some manner of causing secondary glaucoma. Increased intraocular pressure is anticipated, with rupture of the capsule and lens matter streaming into the anterior chamber. The same is true of the lens luxated into the anterior chamber with the capsule intact. This tissue in the vitreous, it is well known, is also a cause of recurring iridocyclitis and associated glaucoma. Other mechanisms by which the lens induces glaucoma are, however, clinically less common and less well known. Even without actual conclusive proof, the lens may frequently be suspected of being the indirect or direct factor producing abnormally high intraocular pressure. Clinical records have been reviewed and material of the pathologic laboratory has been studied in the hope of constructing a classification of glaucoma attributable to abnormality of the lens. This classification is made up of two groups : 1. Glaucoma with the