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D000368:Aged; D002386:Cataract / Q000145:classification / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy; D006801:Humans; D008027:Light; D008853:Microscopy / Q000295:instrumentation; D008854:Microscopy, Electron; D008875:Middle Aged; D009885:Ophthalmology / Q000295:instrumentation