# How do eyelids work?

**URL:** <https://boards.straightdope.com/t/how-do-eyelids-work/70057>\
**Category:** Factual Questions\
**Created:** [June 25, 2001, 6:38am UTC](https://boards.straightdope.com/t/how-do-eyelids-work/70057 "2001-06-25T06:38:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![typo\_mna](https://avatars.discourse-cdn.com/v4/letter/t/eb8c5e/32.png) [@typo\_mna](https://boards.straightdope.com/u/typo_mna)\
**Post date:** [June 25, 2001, 6:38am UTC](https://boards.straightdope.com/t/how-do-eyelids-work/70057/1 "2001-06-25T06:38:58Z")

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During wakey time, my eyelids want to stay up. When sleepy time approaches, they want to stay down. During sleepy time, presumably, they stay down throughout. So, what controls the timing of these muscles? How’s it work?