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when its dark your pupils grow because they are trying to look for light for them to see, and when its too light, they get small, trying to minimize the light going through them

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Q: How do your pupils get bigger and smaller?
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Related questions

Do your pupils get bigger or smaller when they are dilated?

Dilated pupils are bigger, and constrictred pupils are smaller.

When your pupiles dilate do they get bigger or smaller?

Dilated pupils are bigger, and constrictred pupils are smaller.

When you cry are your pupils smaller or bigger?


Why cant you see less when your pupils get smaller?

Because your pupils adjust to the light and when there is more light your pupils get smaller and when there isn't much light your pupils get bigger .

Are pupils supposed to be big or small?

Well when you are inside or in a low lighted area your pupils get bigger, but when you outside when its bright your pupils get smaller.

Why does your pupils get smaller then it gets bigger repeatedly?

When it gets dark, your pupils grow big. When the light is on, your pupils grow smaller. Why this answer? Here's a good explanation. It all depends on light and how much of it there is.

Do your pupils get bigger when you lie?

Mine get smaller when i lie. you can test this by when your with your girlfriend or boyfriend your pupils usually get big cause you like them. then go stand in the mirror and tell a lie while watching them then you'll know if they get bigger or smaller.

Why do your geckos pupils get bigger then get smaller?

The same as ours do... light constricts (smaller), darkness dilates (larger) the pupil.

Why do owls pupils get bigger?

Owl's pupils get bigger because there pupils react to movement and light causing them to enlarge there pupils.

Why do your pupils get bigger and smaller?

because when it it is bright like when somebody shines a torch in your eyes your pupils get smaller to stop all the bright light getting in your eyes so it won't damage your eyes and when it is dark like at 12:00 at night and you turn your light off your pupils get bigger to try and find some light it can let in to help you see better in the dark!!!

how do u know someone has a crush on u?

Ask them if they do or not.

What is similar between a camera and an eye?

the hole in the front of a camera can be made bigger or smaller to control how much light gets in. Your eyes work in a similar way. To much light can damage your eyes, so your pupils get smaller when it is very bright and in dim light your pupils get very bigger to let more light in