Primary glaucoma may, with few exceptions, be divided into two great anatomic types1 according to the mechanical cause of the increased intraocular pressure. One type is characterized by a normal or deep chamber and an open iridic angle (fig. 1) in which the increased pressure is caused by blockage of the sclerocorneal trabeculum. A rational operation, "goniotomy,"2 was suggested for its relief. The second type is characterized by a shallow chamber and a narrow angle and is produced by obstruction of the filtration angle by the root of the iris (fig. 2). An operative procedure for this type of glaucoma is here-with presented. This operation is equally adapted to the late stages in which adhesions have not formed and as a preventive or prophylactic operation in the early stages. It may also be employed with safety and without complicating sequelae in those cases in which the intraocular tension
BARKAN O. AN OPERATIVE PROCEDURE FOR GLAUCOMA OF SHALLOW CHAMBER TYPE: MULTIPLE EXCISIONS OF THE ROOT OF THE IRIS AND DEEPENING OF THE ANTERIOR CHAMBER. Arch Ophthalmol. 1939;21(2):331–345. doi:10.1001/archopht.1939.00860020135010
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