Transient darkening in one eye

Some elderly people sometimes inexplicably suddenly lose their sight in one eye, and then get better after a minute or a few, and some reappear several times, and some of them will experience half-numbness for days or months after the above situation , Sudden limb failure, and even hemiplegia. The above symptoms are medically called monocular transient blackness, which refers to a sudden, temporary loss of vision in one eye.