B1: No light perception in either eye up to light perception but inability to recognize the shape of a hand at any distance or in any direction.
B2: From ability to recognize the shape of a hand up to visual acuity of 2/60 and/or visual field of less than 5 degrees.
B3: From visual acuity of above 2/60 up to visual acuity of 6/60 and/or visual field of more than 5 degrees and less than 20 degrees.< />
All classifications refer to level of vision in both eyes with best correction. (i.e. All athletes who use contact or corrective lenses must wear them for classification, whether they intend to compete wearing them or not.)