This video is an introduction and bit of history of the United States Blind Golf Association, which is a 501c3 non-profit association.

There are three eye sight categories:
      B1 – totally blind with no light perception
      B2 – from the ability to recognize the shape of a hand up to visual acuity of 20/600
      B3 – from the visual acuity above 20/600 up to visual acuity of less than 20/200