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B1 is a medical-based Paralympic classification for blind sport. Competitors in this classification Athletes in this classification are totally or almost totally blind. It is used by a number of blind sports including para-alpine skiing, para-Nordic skiing, blind cricket, blind golf, five-a-side football, goalball and judo. Some sports have equivalents to this class, including adaptive rowing, athletics and swimming. Classification is often handled on the international level by the International Blind Sports Federation (IBSA) though classification is handled by national sport federations. There are exceptions for sports like athletics and cycling, where classification is handled by their own governing bodies. The B1 classification was first created by the IBSA in the 1970s, and has largely remained unchanged since despite an effort by the International Paralympic Committee (IPC) to move towards a more functional and evidence-based classification system. Some sports like athletics and swimming have independently created their own classification equivalent that is comparable to the IBSA created B1 class. Equipment utilized by competitors in this class may differ from sport to sport, and may include sighted guides, guide rails, beeping balls and clapsticks. There may be some modifications related to equipment and rules to specifically address needs of competitors in this class to allow them to compete in specific sports. Some sports such as athletics specifically do not allow a guide, whereas cycling and skiing require one. ==Definition== B1 is a disability sport classification for people who are legally blind.〔 The International Blind Sports Federation (IBSA) defines this classification as visual acuity poorer than Visual acuity poorer than LogMAR 2.60.〔(【引用サイトリンク】title=Classification )〕 The Canadian Paralympic Committee defined this classification as "No functional vision." A competitor in this class could not read newspaper print.〔 This classification is borrowed by some other sports, including blind golf who also define the class as "No light perception in either eye, up to light perception but inability to recognise the shape of a hand at any distance or in any direction." Para-alpine skiing specific versions of this definition include one by the Australian Paralympic Committee which defined this classification as this classification in alpine skiing as "Athletes totally blind or who have some light perception but can't see even the shape of a hand at any distance from their face." The International Paralympic Committee defined this classification for alpine skiing as "No light perception in either eye, up to light perception but inability to recognise the shape of a hand at any distance or in any direction."〔 This is included as an appendix in the media guide, but it is not published by the APC.〕 This classification has parallels in other sports. The comparative classification in adaptive rowing is LTA-B1.〔 In para-equestrian, Grade 3 is equivalent to B1. The para-equestrian classification definition is different from the IBSA one, with ''BBC Sport'' defining Grade 3 as, "Grade 3 incorporates Cerebral Palsy, Les Autres, Amputee, Spinal Cord Injury and totally blind athletes with good balance, leg movement and co-ordination." The B1 equivalent for swimming is S11.〔 For athletics, the equivalent classification is T11.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「B1 (classification)」の詳細全文を読む スポンサード リンク
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