Well they were red and dilated, the reason I ask is because my dad was like all pissed off because he thought I was stoned (which i was) and was like "Your eyes are dilated, were you smoking pot?" He used to be a big stoner and says that they make your eyes dilated. I didn't think they made your eyes dilated either. But idk.
I think for some people I have seen there pupils dialate but not much.
..the tall candles sank into nothingness; their flames went out utterly; the blackness of darkness supervened; all sensations appeared swallowed up in a mad rushing descent as of the soul into Hades. - Poe
They can dialate a little bit. Me and some friends went to the movies and we got there a little late after smoking a bunch of bowls. The movie had started so all the lights were off in the theater. When we walked in we could not see one thing. Even with the light from the movie itself we could not see any of the seats or reflections on anyone's faces. We just stood in the front for like 5 minutes waiting for our eyes to adjust but they never did so we eventually walked around and found seats. It was hilarious because we didn't even know we were in the front row until I stretched out my legs and I figured out there weren't seats in front of us.