title: The fourth image of Purkinje: a diagnostic tool in microtropia.
abstract: The displacement of the fourth Purkinje image, obtained photographically, is used to assess the presence of small angles of deviation (microtropia).
mesh_terms: D000065:Accommodation, Ocular; D002648:Child; D005133:Eye Movements; D006801:Humans; D007908:Lens, Crystalline / Q000503:physiopathology; D010781:Photography / Q000379:methods; D013285:Strabismus / Q000175:diagnosis* / Q000503:physiopathology