More than half a century has elapsed since Gifford1first described glaucoma due to hypermature cataract and urged its prevention by cataract extraction. Verhoeff and LeMoine,2H. Knapp,3Kaufman,4Courtney,5Heath,6the Irvines,* Sugar,10Hubbersty and Gourlay,11and, recently, Ballen and Hughes12have reported on their experiences with this entity and have discussed its prevention and appropriate therapy. Theirs have all been reports based on small numbers of cases, and the condition is generally considered to be "unusual." Glaucoma of this type, which usually has a violent onset, presents a remarkably bland, but strikingly characteristic, pathologic picture: liquefaction of the lens cortex, open iridocorneal angles, and the presence of large histiocytes which have engulfed liquefied lens material and are obstructing the trabecular apparatus. These features were first described by Zeeman,13who named the condition "phacogenetic glaucoma." Irvine and Irvine * amplified