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Visual agnosia

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Visual agnosia is the inability to understand the meaning of visual stimuli despite apparently normal vision. There is a loss of recognition of visual percepts.

There are two stages of visual agnosia:

  • apperceptive agnosia:
    • this is more severe and represents an inability to categorise or manipulate the visual percept in any way
    • the patient may be unable to distinguish shape or say if they have seen an object before

  • associative agnosia:
    • this is less severe because a limited understanding of the relevance of a visual object is retained
    • the patient may realise they are looking at a face but be unable to recognise who's face it is (prosopagnosia)

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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