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... > social science subjects > psychology > cognitive psychology > learning and perception > cognitive processes > perception (psychology) > disorders of perception > visual disorders: blindness
... > social science subjects > psychology > cognitive psychology > perception (psychology) > disorders of perception > visual disorders: blindness
... > social science subjects > psychology > cognitive psychology > learning and perception > cognitive processes > perception (psychology) > visual perception > visual disorders: blindness
... > social science subjects > psychology > cognitive psychology > perception (psychology) > visual perception > visual disorders: blindness

Preferred term

visual disorders: blindness  

Definition

  • Blindness is the complete absence or severe impoverishment of vision. The World Health Organization (WHO) defines blindness as acuity of less than 20/400 in the better eye (in case of unequal vision loss across the two eyes) or a visual field of less than 10° around fixation. [Source: Encyclopedia of Perception; Visual Disorders: Blindness]

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https://concepts.sagepub.com/social-science/concept/visual_disorders:_blindness

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