title: Amblyopia as the presenting symptom in pernicious anemia.
mesh_terms: D000550:Amblyopia / Q000209:etiology*; D000752:Anemia, Pernicious / Q000150:complications* / Q000188:drug therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D014805:Vitamin B 12 / Q000627:therapeutic use
chemical_list: D014805:Vitamin B 12