title: [Monocular polyopia in nuclear cataract].
abstract: Only patients with primary nuclear cataracts perceive multiplied images caused by the lens. All of them see these images in a lambda-shaped arrangement. This is not a diplopia caused by the two focal points of a 'Linse mit doppeltem Brennpunkt' (double-focus lens). The monocular polyopia can be explained by a prismatic effect of the sectors of the lens nucleus.
mesh_terms: D002386:Cataract / Q000175:diagnosis* / Q000503:physiopathology; D004172:Diplopia / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D007907:Lens Nucleus, Crystalline / Q000503:physiopathology; D012029:Refraction, Ocular; D014796:Visual Perception / Q000502:physiology
vernacular_title: Die Polyopia monocularis bei Kernkatarakt.