title: Proper retrospective study.
authors: G J
authors: GJ
authors: Berdy
authors: C W
authors: CW
authors: Roberts
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D002217:Carbachol / Q000494:pharmacology; D002387:Cataract Extraction; D004812:Epidemiologic Methods; D006801:Humans; D007429:Intraocular Pressure / Q000187:drug effects; D012107:Research Design; D012189:Retrospective Studies
chemical_list: D002217:Carbachol; D000109:Acetylcholine