Metronidazole has the potential to cause visual disturbances, but not damage to the eyes themselves, mainly related to neurological effects. Metronidazole is a commonly used antibiotic in clinical work, for the control of anaerobic infections as well as the treatment of trichomonas infections and other effects, but the adverse drug reactions are also more, in addition to the possibility of affecting the liver function, and the role of alcohol caused by the disulfiram-like reaction, affecting the heart, but also may affect the function of the nervous system, so it is possible to appear visual impairment performance. Metronidazole belongs to the prescription drugs, patients are not recommended to use on their own, when the patient has an infection manifestation should be timely to the hospital, under the guidance of the doctor reasonable choice of antibiotics to use, and try to avoid the occurrence of adverse reactions.