Source:http://linkedlifedata.com/resource/umls/id/C0012569
MSH: A visual symptom in which a single object is perceived by the visual cortex as two objects rather than one. Disorders associated with this condition include REFRACTIVE ERRORS; STRABISMUS; OCULOMOTOR NERVE DISEASES; TROCHLEAR NERVE DISEASES; ABDUCENS NERVE DISEASES; and diseases of the BRAIN STEM and OCCIPITAL LOBE.,NCI: The condition in which a single object appears as two objects. Also called "double vision." (from medterms.com)