Your irises may dilate.
A medical condition in which two irises, pupils, and corneas are formed in each eye.
You can find irises in temperate parts of the world. There are over 300 species.
Black pupils are standard. Black irises would have to be fake. Contacts most likely
E.T. the Extra-Terrestrial has large, almond-shaped eyes that are black with no defined irises or pupils.
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."
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'
pupils
William Rickatson Dykes has written: 'A handbook of garden irises' -- subject(s): Irises (Plant), Irises (Plants) 'Irises' -- subject(s): Iris (Plant), Irish