B4 (classification)

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This article is about the parasports classification. For other uses, see B4.

B4 is a blind sport classification used in a variety of sports including sailing, bowls, swimming, and cycling. Unlike other blind sport classes, it only uses visual acuity for the purpose of being classed into it.

Definition[edit]

This is a medical classification for people with visual impairments.[1] Unlike other blind sport classes, it only uses visual acuity for the purpose of being classed into it.[2] BlindSports SA defines this classification as "This is from visual acuity above 6/60 up to and including visual acuity of 6/24 (up to 25%). No visual field is considered."[3] USABA defines this classification as "from visual acuity above 20/200 and up to visual acuity of 20/70 and a visual field larger than 20 degrees in the best eye with the best practical eye correction."[4]

Governance[edit]

In the United States, this classification is governed by the United States Association of Blind Athletes (USABA).[4][1][5] In New Zealand, this classification is governed by Blind Sport New Zealand.[6] In the United Kingdom, the classification is governed by British Blind Sport (BBS),[7] which is recognised nationally by Sport England.[8]

On a sport specific level, Blind Sailing handles national governance related to this class in the United Kingdom.[9] BBS handles governance for blind cricket in the United Kingdom.[7] In golf in Scotland, classification is handled by Scottish Blind Golf.[10]

Sport[edit]

Competitors in this classification are not eligible to compete in international competitions.[11] The classification is used in national competitions in Canada, Australia, the United States and the United Kingdom.[11][3][4][12] It is used in a variety of sports including sailing,[9] bowls,[13] swimming,[14] and cycling.[15] B4 cyclists compete on tandem bicycles with a guide rider.[15] Junior IBSA blind sailing events sometimes allow for B4 competitors in international events.[2]

In blind cricket, B1, B2, B3 and B4 cricketers all play at the same time, but a maximum combined total of seven B2, B3 and B4 cricketers are allowed on the field at one time.[7] Scottish Blind Golf gives golfers in this classification a maximum handicap of 28 for men, with the handicap for women being slightly higher.[10]

While historically the English National Association of Visually Handicapped Bowlers had included limited field of vision as a consideration for this class, it was dropped because this vision issue did not impact ability in bowls.[13]

For swimming, the classification was eligible to compete at the 2012 Blind Sporting Association Australian Swimming Championships.[14]

There is an equivalent to this classification in blind archery known as VI Open, which is open to people with visual acuity of less than 20 degrees.[16] They should be able to use a bow sight.[17]

Equestrian sport is not open to Paralympic sport in this classification.[18]

History[edit]

This classification traces its history to the early history of blind sport. There was a belief that those with vision impairment that was less severe had a competitive advantage over competitors who had more severe impairment. Classification was developed by the IBSA to insure more even competition across the different bands of visual acuity.[19]

The International Sports Organization for the Disabled (ISOD) developed a blind classification system in 1976. The rise of the IBSA meant the ISOD classification system did not dominate as the primary classification system for blind sports competitors. The early classification system for blind sport was developed by the IBSA in 1980.[20]

The International Paralympic Committee made an attempt in 2003 to address "the overall objective to support and co-ordinate the ongoing development of accurate, reliable, consistent and credible sport focused classification systems and their implementation."[21]

B4+[edit]

There is a blind sport classification above B4 called B4+. This is used in the United Kingdom and is defined as "an individual with an acuity of 6/24 would be able to read the three top lines on a Snellen chart at six metres."[12]

References[edit]

  1. ^ a b Michael Horvat; Leonard H. Kalakian; Ron Croce; Virginia Dahlstrom (5 February 2010). Developmental/Adapted Physical Education: Making Ability Count. CUMMINGS. p. 361. ISBN 978-0-321-67827-0. Retrieved 21 October 2012.
  2. ^ a b "BSI Blind Sailing International| Eligibility". Blind Sailing International. Archived from the original on 2013-10-08. Retrieved 2012-10-21.
  3. ^ a b "BlindSports SA". BlindSports SA. Retrieved 2012-10-03.
  4. ^ a b c Joseph P. Winnick (27 October 2010). Adapted Physical Education and Sport. Human Kinetics. p. 245. ISBN 978-0-7360-8918-0. Retrieved 21 October 2012.
  5. ^ "The United States Association of Blind Athletes". Usaba.org. Retrieved 2012-10-21.
  6. ^ "The Official site of Blind Sport New Zealand Inc". Blind Sport New Zealand. Archived from the original on 2013-02-06. Retrieved 2012-10-21.
  7. ^ a b c "Blind Cricket Laws". Blind Cricket UK. Archived from the original on 2012-06-20. Retrieved 2012-10-21.
  8. ^ Nesta Wiggins-James; Rob James; Graham Thompson (2005). AS PE for AQA. Heinemann. p. 237. ISBN 978-0-435-49930-3. Retrieved 14 April 2013.
  9. ^ a b "Welcome to Blind Sailing". Blindsailing.net. Retrieved 2012-10-21.
  10. ^ a b "How to get involved". Scottish Blind Golf. Archived from the original on 2012-08-29. Retrieved 2012-10-21.
  11. ^ a b "Canadian Para-Nordic Classification Percentages for National Competitions (effective April 1st, 2012)". Canada: Cross Country Canada. 1 April 2012. Archived from the original (pdf) on 2012-10-04. Retrieved 3 October 2012.
  12. ^ a b "Membership :: Sight Classification Form". British Blind Sport. Archived from the original on 2016-03-09. Retrieved 2012-10-03.
  13. ^ a b Donald F. C. Loran; Caroline J. MacEwen (1995). Sports Vision. Butterworth-Heinemann. ISBN 978-0-7506-1578-5. Retrieved 21 October 2012.
  14. ^ a b "2012 Blind Sporting Association Australian Swimming Championships". vi family network. 2012-08-20. Retrieved 2012-10-21.
  15. ^ a b Linda Mastandrea; Donna Czubernat (30 October 2006). Sports and the physically challenged: an encyclopedia of people, events, and organizations. Greenwood Press. p. 36. ISBN 978-0-313-32453-6. Retrieved 21 October 2012.
  16. ^ Michael A. Johnson; David Keating (2008). Assistive Technology for the Vision-Impaired and Blind. Springer. p. 689. ISBN 978-1-84628-867-8. Retrieved 14 April 2013.
  17. ^ "Shooting Categories". United Kingdom: British Blind Sport Archery. 2013. Archived from the original on 16 April 2014. Retrieved 14 April 2013.
  18. ^ "Equestrian". Paralympics Great Britain. 2012. Retrieved 14 April 2013.
  19. ^ Donald F. C. Loran; Caroline J. MacEwen (1995). Sports Vision. Butterworth-Heinemann. p. 45. ISBN 978-0-7506-1578-5. Retrieved 14 April 2013.
  20. ^ Yves Vanlandewijck; Walter Thompson (13 July 2011). Handbook of Sports Medicine and Science, The Paralympic Athlete. John Wiley & Sons. ISBN 978-1-4443-4828-6. Retrieved 14 April 2013.
  21. ^ "Paralympic Classification Today". International Paralympic Committee. 22 April 2010. p. 3. {{cite web}}: Missing or empty |url= (help)
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