Hemianopsia

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

Hemianopsia, or hemianopia, is a loss of vision or blindness (anopsia) in half the visual field, usually on one side of the vertical midline. The most common causes of this damage are stroke, brain tumor, and trauma.

Excerpt from the Wikipedia article “Hemianopsia”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Albert Kok at Dutch Wikipedia, Public domain, via Wikimedia Commons.