Ticho, B H Nondetectable electroretinogram in combined methylmalonic aciduria and homocystinuria. [electronic resource] - Annals of ophthalmology May 1992 - 180-1 p. digital Publication Type: Case Reports; Journal Article ISSN: 0003-4886 Subjects--Topical Terms: Child, PreschoolDiagnosis, DifferentialElectroretinographyFemaleHomocystinuria--physiopathologyHumansMethylmalonic Acid--urinePhotoreceptor Cells--physiopathologyRetinal Degeneration--diagnosis