Normally, no, but there are certainly people with the ability to voluntarily control it. It can be learned.
Pupils reacts to light, narrowing in bright light and widening in poor light - so is a reflex action.
The opposite of dilated pupils is constricted pupils.
pupil slipups, pupils slipup, pupils pupils, slipup pupils
Owl's pupils get bigger because there pupils react to movement and light causing them to enlarge there pupils.
Dilated pupils are bigger, and constrictred pupils are smaller.
1,252 pupils
pupils of the same size
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 .
Lortab will cause contraction of your pupils. (i.e. smaller pupils)
80 pupils
voluntary
Pupils'. When you have a plural possessive, then the apostrophe goes after the s. If a pupil owns something, that is the pupil's stuff. If pupils collectively own something, that is the pupils' stuff.