Smaller. In a scientific research study nasa did in 1998, again in 2008 they found the adrenal glands produce a gas if you will that makes your pupils shrink three times its normal size. If you drink...
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
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.