In Judo, athletes are classified according to three levels of visual impairment: B1, B2 and B3.

B1: Athletes have a total absence of perception of the light in both eyes, or some perception of the light but with inability to recognize the form of a hand at any distance and in any direction.

B2: Athletes have ability to recognize the form of a hand to a visual acuity of 2/60 and/or a visual field of less than five degrees.

B3: Athletes have a visual acuity of above 2/60 to a visual acuity of 6/60 and/or a visual field or more than five degrees and less than 20 degrees.

For more information please visit http://www.ibsa.es/eng/deportes/judo/reglamento1.htm.