How can i get blind ?

Too many are blind: Blindness means a person cannot see at all through either eye. Blindness can also mean partial blindness, severe visual impairment, or extreme low vision, in one or both eyes. Common causes of blindness include diabetes, macular degeneration, traumatic eye injuries, serious eye infections, etc. Less common causes include retinal damage in premature babies, a lack of vitamin A, eye cancer, etc...