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Hyphema

Hyphema is the medical condition of bleeding in the chamber of the eye between the iris and the . People usually first notice a loss or decrease in vision. The eye may also appear to have a reddish tinge, or it may appear as a small pool of blood at the bottom of the iris in the cornea. A traumatic hyphema is caused by a blow to the eye. A hyphema can also occur spontaneously.

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Plain-language summary adapted from Wikipedia. Not medical advice.