While angle-closure glaucoma is more commonly due to pupillary block, the plateau iris syndrome (angle crowding) can also cause angle-closure glaucoma. In plateau iris, the anterior chamber angle is narrow despite a normal or near normal anterior chamber depth. The peripheral or final iris roll may be thickened and somewhat convex in character. The iris base may insert more anteriorly than usual at the level of the scleral spur.
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While angle-closure glaucoma is more commonly due to pupillary block, the plateau iris syndrome (angle crowding) can also cause angle-closure glaucoma. In plateau iris, the anterior chamber angle is narrow despite a normal or near normal anterior chamber depth. The peripheral or final iris roll may be thickened and somewhat convex in character. The iris base may insert more anteriorly than usual at the level of the scleral spur.
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