It shall be unlawful for any person who is subject to epilepsy, vertigo, or other infirmity of mind or body which would render him incapable of the safe operation of a vehicle or trackless trolley, to operate any of the same. The foregoing provision shall not bar a person whose eyesight is defective from operating a vehicle, if his vision is brought to normal by a proper correction.
('73 Code, § 72.03)