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  2. Visual impairment - Wikipedia

    en.wikipedia.org/wiki/Visual_impairment

    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]

  3. Congenital blindness - Wikipedia

    en.wikipedia.org/wiki/Congenital_blindness

    People that are pregnant from families with a history of congenital blindness will be closely monitored and need to carry out genetic testing in order to identify whether there is a mutation or not. Red reflex testing is done in neonates, infants, and children to assess eye and vision function. [ 26 ]

  4. Visual agnosia - Wikipedia

    en.wikipedia.org/wiki/Visual_agnosia

    Individuals with prosopagnosia know that they are looking at faces, but cannot recognize people by the sight of their face, even people whom they know well. [ 6 ] Simultagnosia , an inability to recognize multiple objects in a scene, including distinct objects within a spatial layout and distinguishing between "local" objects and "global ...

  5. Recovery from blindness - Wikipedia

    en.wikipedia.org/wiki/Recovery_from_blindness

    In spite of the surgery on his right eye, his newly regained vision, after blindness of forty years, is not fully recovered. Thinus-Blanc and Gaunet (1997) suggest that early blinded people show limited ability in spatial representation. Michael still struggles to identify pictures or illustrations.

  6. Inattentional blindness - Wikipedia

    en.wikipedia.org/wiki/Inattentional_blindness

    The following criteria are required to classify an event as an inattentional blindness episode: 1) the observer must fail to notice a visual object or event, 2) the object or event must be fully visible, 3) observers must be able to readily identify the object if they are consciously perceiving it, [3] and 4) the event must be unexpected and the failure to see the object or event must be due ...

  7. A new surgery can give legally blind people 20/20 vision - AOL

    www.aol.com/news/2016-12-15-a-new-surgery-can...

    By Nathan Rousseau Smith, Buzz60. Eyesight is arguably one of the most devastating senses a person can lose, and damaging it is all too common. According to the CDC, 3.4 million Americans aged 40 ...

  8. Blindsight - Wikipedia

    en.wikipedia.org/wiki/Blindsight

    The majority of studies on blindsight are conducted on patients who are hemianopic, i.e. blind in one-half of their visual field.Following the destruction of the left or right striate cortex, patients are asked to detect, localize, and discriminate amongst visual stimuli that are presented to their blind side, often in a forced-response or guessing situation, even though they may not ...

  9. Achromatopsia - Wikipedia

    en.wikipedia.org/wiki/Achromatopsia

    Achromatopsia, also known as rod monochromacy, is a medical syndrome that exhibits symptoms relating to five conditions, most notably monochromacy.Historically, the name referred to monochromacy in general, but now typically refers only to an autosomal recessive congenital color vision condition.