Gonioscopy of a patient with an episode of post–cataract surgery reverse pupillary block. a. This is a vitrectomized myopic eye, and one can see the severe peripheral iris concavity as well as the bleeding caused by extreme stretching of the iris. Intraocular pressure is 38. b. Same eye 1 hour later after a laser peripheral iridotomy has been performed. The iris is no longer bowed back, and intraocular pressure has dropped to 12.