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B2 is a medical based Paralympic classification for blind sport. Competitors in this classification have vision that falls between the B1 and B3 classes. 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 ...
American Foundation for the Blind. The American Foundation for the Blind ( AFB) is an American non-profit organization for people with vision loss. AFB's objectives include conducting research to advance change, promoting knowledge and understanding, and shaping policies and practices. Kirk Adams, formerly the first blind president and CEO of ...
Color vision deficiencies can be classified as inherited or acquired. Inherited: inherited or congenital/genetic color vision deficiencies are most commonly caused by mutations of the genes encoding opsin proteins. However, several other genes can also lead to less common and/or more severe forms of color blindness.
The class numbers were given prefixes of "T", "F" and "P" for track, field and pentathlon events, respectively. Visually impaired athletes classified 11 run with full eye shades and a guide runner; those classified 12 have the option of using a guide; those classified 13 did not use a guide runner.
B3 (classification) B3 is a medical based Paralympic classification for blind sport. Competitors in this classification have partial sight, with visual acuity from 2/60 to 6/60. 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.
The visual system is associated with the eye and functionally divided into the optical system (including cornea and lens) and the neural system (including the retina and visual cortex ). The visual system performs a number of complex tasks based on the image forming functionality of the eye, including the formation of monocular images, the ...
Visuospatial function refers to cognitive processes necessary to "identify, integrate, and analyze space and visual form, details, structure and spatial relations" in more than one dimension. [1] Visuospatial skills are needed for movement, depth and distance perception, and spatial navigation. [1] Impaired visuospatial skills can result in ...
Background. As a result of increased sales of full electric vehicle and hybrid electric vehicles in several countries, some members of the blind community have raised concerns about the noise reduction when those vehicles operate in all-electric mode, as blind people or the visually impaired consider the noise of combustion engines a helpful aid while crossing streets and think quiet hybrids ...