Fig. 9 Histopathology of healed tears in Descemet's membrane from congenital glaucoma. A. Regenerating corneal endothelium has produced new basement membrane in the bed of the tear and over each edge (arrows) of the tear. B. Main figure demonstrates one edge of the tear in Descemet's membrane, which has separated from the overlying stroma and coiled anteriorly like a watch spring. Regenerated basement membrane has encased this and formed a prominent ledge. Inset. Other edge of the tear, in which regenerated basement membrane forms a ridge protruding into the anterior chamber. (Waring GO, Laibson PR, Rodrigues MM: Clinical and pathologic alterations of Descemet's membrane: With emphasis on endothelial metaplasia. Surv Ophthalmol 18:325, 1974)