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Visual or vision impairment (VI or VIP) is the partial or total inability of visual perception.In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment, visual impairment may cause the individual difficulties with normal daily tasks, including reading and walking. [6]
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.
Category: Blindness. 54 languages. ... This category has the following 13 subcategories, out of 13 total. ...
B2 is a disability sport classification for people who are visually impaired. [2] The International Blind Sports Federation (IBSA) defines this classification as "visual acuity ranging from LogMAR 1.50 to 2.60 (inclusive) and/or visual field constricted to a diameter of less than 10 degrees."
This category reflects the organization of International Statistical Classification of Diseases and Related Health Problems, 10th Revision. Generally, diseases outlined within the ICD-10 codes H53-H54 within Chapter VII: Diseases of the eye, adnexa should be included in this category.
Childhood blindness is an important contribution to the national prevalence of the disability of blindness. [3] Blindness in children can be defined as a visual acuity of <3/60 in the eye with better vision of a child under 16 years of age. [ 4 ]
Low vision visual acuity examinations are done using the LogMAR chart. The advantage that this presents with is that it allows for more accurate measures of the individual's vision to be recorded. Other tests done and their significance are as follows: Amsler's grid test - to locate scotomas on the visual field of the individual
B1 is a medical-based Paralympic classification for blind sport. Athletes in this classification are totally or almost totally blind. It is used by a number of blind sports including blind tennis, blind cricket, blind golf, five-a-side football, goalball and judo.