Your irises may dilate.
No, when your pupils get bigger (dilate), your irises do not get smaller. The iris is the colored part of the eye that controls the size of the pupil. When the pupil dilates, the muscles in the iris relax, allowing the pupil to expand, but the overall size of the iris remains the same.
You can find irises in temperate parts of the world. There are over 300 species.
E.T. the Extra-Terrestrial has large, almond-shaped eyes that are black with no defined irises or pupils.
Black pupils are standard. Black irises would have to be fake. Contacts most likely
Yes, the sympathetic innervations of both irises are closely integrated. Both irises receive sympathetic input from the superior cervical ganglion through the long ciliary nerves, helping to dilate the pupils in response to stress or low light conditions.
Usually, if a cats pupils fill it's irises, it is scared. If their eyes are in slits, some people could say they're scared, but usually they're alert if they're slits. And, mostly when cats are happy, or relaxed, their pupils are fat slits, but not so they fill up their irises.
One can find a school for gifted pupils from a local elementary school or a high school. They usually know other schools which are for really smart pupils.
I would use "irises."
Pupula duplex is a rare condition where an individual has two pupils in one eye. This anomaly can be congenital or acquired due to trauma or surgeries. It may result in blurred vision, light sensitivity, and other visual disturbances.
Do not allow irises to become too crowded in your garden because the irises will flower poorly or not at all.
Vincent van Gogh painted 'Irises'