answersLogoWhite

0

In your eye? That is the iris (not a halo). Your iris is actually a sphincter (a circular muscle) and it will expand or constrict to control how much light is let into your eye. That is why in dim light your pupil will be really big, because it is opening wide to try to let in as much light as possible so you can see better.

User Avatar

Wiki User

14y ago

Still curious? Ask our experts.

Chat with our AI personalities

ReneRene
Change my mind. I dare you.
Chat with Rene
LaoLao
The path is yours to walk; I am only here to hold up a mirror.
Chat with Lao
BeauBeau
You're doing better than you think!
Chat with Beau

Add your answer:

Earn +20 pts
Q: Why have you got a halo around your pupil?
Write your answer...
Submit
Still have questions?
magnify glass
imp