[Acute blindness in a patient with metformin-associated lactic acidosis].

Lactic acidosis is a rare metabolic complication that can occur in patients with diabetes mellitus type 2 who use metformin. We discuss a 79-year old woman with metformin-associated lactic acidosis (MALA) and acute kidney injury based on gastroenteritis. Patient reported acute blindness which in literature is described as a rare presentation of a metabolic acidosis (regardless of its underlying cause).