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A blown pupil usually refers to a pupil that is completely dilated and no longer responding to light.

A blown pupil (also called 'fixed and dilated') is when one or both of the pupils are large and do not respond (constrict) to light. Possible causes may include trauma to the eye, brain injury, pressure or trauma to the optic nerve.

Often used in medical drama shows when diagnosing someone who has no brain activity - basically brain dead, but the two are not inextricably inked.

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Q: What does blown pupil indicate?
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