When your eyes are closed, are your pupils big or small?

Moment of Um

American Public Media

Kids & Family, Education For Kids

4.4 • 1.5K Ratings

🗓️ 9 April 2024

⏱️ 5 minutes

🔗️ Recording | iTunes | RSS

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Summary

Have you ever stared in the bathroom mirror and flicked the light on and off and watched what happens to your pupils? They get bigger, then smaller, then bigger, then smaller, right? One of our listeners was wondering what happens to our pupils when we close our eyes. Since we can’t see through our own eyelids, we called on Sasha Strul, University of Minnesota Pediatric Ophthalmologist, to help us discover the answer.

Do you have a Moment of Um question for us? Send it to us at BrainsOn.org/contact, and we’ll help open your eyes to the answer.

Transcript

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0:00.0	Today's episode is sponsored by Green Light. Did you know that 27 states don't require a personal
0:06.4	finance course for students even though teens score an average of 64% on the National
0:12.2	Financial Literacy Test? Let's make a difference. 64% on the national financial literacy test?
0:14.0	Let's make a difference.
0:16.0	Our friends at Million, Basilian, and Green Light are hitting the road visiting schools
0:20.2	to teach important lessons on financial literacy.
0:23.0	It's all the fun of the podcast, but now live and interactive.
0:27.0	Million Bazillion Live is in partnership with Green Light, the Money App for Kids and Teens.
0:32.0	Learn more about Green Light at greenlight. Greenlight. Light, the Money App for Kids and Teens.
0:32.6	Learn more about Green Light at greenlight.com
0:35.1	slash million.
0:36.5	That's Green Light.com slash million.
0:39.3	From the brains behind Brainson,
0:41.3	this is the moment of um.
0:45.0	Answering those questions that make you go.
0:47.0	Ah, uh, uh, oh, um. Moment of um comes to you from APM Studios. I'm Sandin Totten.
1:05.7	You ever notice that your eyes have a black circle in the middle of the colored part?
1:10.7	That's called the pupil. And did you know it can change sizes? Yeah, yeah it can open up to let in more light or it can get smaller to cut down on the brightness.
1:21.0	Go ahead and check it out sometime in front of a mirror. I can see that my
1:24.8	peoples get kind of small when I shine a light on them and pretty big in the dark. But something
1:29.9	I've never been able to test is the size they are when my eyes are closed and I'm not the
1:35.1	only one wondering about that.
	...

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