Penetrating keratoplasty (PKP) is associated with an increased risk of secondary glaucoma. The development of glaucoma after PKP is an important risk factor for decreased corneal graft survival. The incidence of glaucoma after corneal transplant as well as the mechanism of developing increased intraocular pressure is reviewed in this paper. Treatments for post-PKP glaucoma include medications, laser, and surgery. The most frequent surgical glaucoma intervention is implantation of a glaucoma-drainage device. Recent advances in corneal transplantation surgery may help to decrease corneal failure and the risk of developing post-keratoplasty glaucoma.