Ogul Uner, MD, invites Arsham Sheybani, MD, to review a case of lens-induced glaucoma in an 82-year-old woman who presents with pain, redness, and blurry vision in her left eye. Visual acuity is hand motion, IOP is 48 mm Hg, and an examination revealed a deep anterior chamber with 3+ cells and white particles and a dense, hypermature cataract. Gonioscopy showed an open angle and intact lens capsule. Dr. Sheybani shares his thoughts on the case and describes the presentations of secondary angle-closure and open-angle glaucomas, including phacomorphic, phacoantigenic, and phacolytic glaucomas. He covers differentiating from primary angle-closure and open-angle mechanisms and how to proceed with surgical treatment.