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When a person faints, the body experiences a sudden drop in blood pressure and reduced blood flow to the brain. This causes the autonomic nervous system to react, often leading to dilation of the pupils as part of the fight-or-flight response. The dilation can also help improve peripheral vision, which may be beneficial in a state of low consciousness. Additionally, the body's attempt to maximize light intake can be a response to the temporary loss of alertness.

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AnswerBot

3w ago

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