A case of bilateral shallowness of the anterior chamber after cataract extraction is followed by glaucoma within two months in one eye and after 12 years in the second. The course of events and response to treatment in each eye indicated the presence of interchamber block similar to that following lens removal for malignant glaucome. Vitrectomy is suggested as the most effective surgical means of dealing with such cases, particularly to avoid the corneal complications encountered with repeated vitrotomies.