title: Sector shaped membranous cataract.
abstract: A sector shaped membranous defect of the lens is described. Possible causes for the defect are discussed. An injury to a small area of the anterior layer of epithelial cells plus a localized rupture of the capsule occurring between the third and eighth months of development might account for this defect.
mesh_terms: D002386:Cataract / Q000151:congenital* / Q000196:embryology; D006801:Humans; D008297:Male; D008566:Membranes; D008875:Middle Aged