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Iris
01
虹膜
(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.
1.1
虹膜（光学）
diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
02
鸢尾
a plant with long narrow leaves and large yellow or purple flowers
iris
01
鸢尾
of a rich, deep purple color that takes its inspiration from the vibrant hues of the iris flower
例子
The iris is the colored part of the eye that regulates the amount of light entering the pupil.
Abnormalities in the iris, such as heterochromia or anisocoria, can be indicative of underlying eye conditions or neurological disorders.
The muscles within the iris contract or relax to adjust the size of the pupil in response to changes in light intensity.
The unique patterns on the iris, known as the iris crypts and furrows, can be used for biometric identification.
The unique patterns on the iris, known as the iris crypts and furrows, can be used for biometric identification.
