Sight classifications are based on an individual’s level of vision. Individuals will undertake a sight test which is then reviewed by a qualified classifier at British Blind Sport. They will assess:

• Visual acuity, which is how far you see directly in front of you
• Visual field, which is your peripheral vision

An individual is then issued with a sight classification certificate that can be used when taking part in competitions.

What are the sight classification categories?

Classification categories are B1, B2, B3, B4 and B5, with B1 being the greatest level of sight loss. B1, B2 and B3 categories are recognised by most sports for UK recreational competitions as well as for international or Paralympic training pathways.

Sight classification categories are based on an individual’s best corrected vision. Best vision means that if an individual’s sight is different on each side, it will be based on the side where they have better vision. Corrected vision means what an individual can see with the use of glasses or lenses, even if this is something that they would not use when taking part in sport.

Breakdown of categories

• B1: Athletes will have no light perception, or some light perception and the ability to perceive some movement, but an inability to recognise shapes.
• B2: Athletes will have significantly limited vision, either in how far or how wide can be seen. This category includes being able to count fingers or being able to recognise/read something at a very short distance. It also includes athletes whose visual field is significantly reduced, even if visual acuity is higher.
• B3: Athletes will have greatly limited visual acuity and/or limited visual field. B3 is the highest category used for most International and Paralympic sports.