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(anatomy) the round colored portion of the eye around the pupil and behind the cornea
What is "iris"?
The iris, a thin circular structure in the eye, contains pigments that give it color and helps control the amount of light that enters the eye through the pupil. It acts like a diaphragm, expanding or contracting to adjust the size of the pupil and regulate the amount of light reaching the retina. The unique pattern and color of the iris are used for identification purposes, making each person's iris distinct and individual.
a mechanical diaphragm made of overlapping plates that can be adjusted to vary the size of an opening, as in a camera lens
a plant with long narrow leaves and large yellow or purple flowers
of a rich, deep purple color that takes its inspiration from the vibrant hues of the iris flower
(of an aperture, especially in a lens) to open or close like an iris diaphragm
