~Blindness~ @_@

A blind person can't detect light. Most people, who are blind can recieve some light or maybe a limited amount of vision. In some blindness, a person may only see a small part of the whole scene. In other blindness, a person sees the opposite. They can only see the surrounding edges of the whole scene. Some others can only determine light or darkness.
blindness is often occur as a disease or malnutrition. About 40 million blind people, and about 80% could have their sight restored through treatments.