WONDER #1429: Why Do Your Pupils Get Bigger in the Dark?

Question 1 of 3

The circular membrane that gives your eyes their color is called the what?

  1. iris
  2. pupil
  3. retina
  4. cornea

Question 2 of 3

When the pupil dilates, it does what?

  1. gets smaller
  2. gets bigger
  3. stays the same size
  4. turns inside out

Question 3 of 3

At what time of day would your pupil likely be the largest?

  1. mid-morning
  2. noon
  3. mid-afternoon
  4. midnight

Check your answers online at https://www.wonderopolis.org/wonder/why-do-your-pupils-get-bigger-in-the-dark.