as we have noted the definition of

as we have noted the definition of legal blindness includes both acuity and field of vision. visual acuity is most often determined by reading letters or numbers on a chart using the snellen test or by using an index that refers to the distance from which an object can be recognized. people with normal eyesight are defined as having 20/20 vision. However if an individual is able to read at 20 feet what a person with normal vision can read at 200 feet then his or her visual acuity would be described as 20/200. most people consider those who are legally blind to have some light perception only about 20 precent are totally without sight. A person is also considered blind if his or her field of vision is limited at its widest angle to 20 degrees or less. A restricted field is also referred to as tunnel vision. A restricted field of vision severely limits a person's ability to participate in athletics read or drive a car