Iris
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  Iris



Iris

    The colored part of the eye with a hole (pupil) in the center. It regulates the amount of light entering the eye – the dimmer the lighting the more light the iris lets into the eye by widening the pupil.

RELATED TERMS
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Iris
The colored part of the eye with a hole (pupil) in the center. It regulates the amount of light entering the eye – the dimmer the lighting the more light the iris lets into the eye by widening the pupil.

Pupil
A circular opening in the center of the iris. The size of the pupil changes according to the amount of light present. It is small in sunlight and large in a dark room.



SIMILAR TERMS
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Iridocyclitis
An inflammation of the iris and ciliary body. It may be due to a disease within the eye or occur as a reaction to an injury or disease elsewhere in the body.

Iris

Iritis
An inflammation of the iris.

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An abnormal physical or psychological state in a male characterized by inability to copulate because of failure to have or maintain an erection.

Indigestion
Impaired digestion, especially after eating.

Infertility
The diminished or absent ability to conceive or produce an offspring while sterility is the complete inability to conceive or produce an offspring.

Influenza
An acute viral infection involving the respiratory tract. It is marked by inflammation of the nasal mucosa, the pharynx, and conjunctiva, and by headache and severe, often generalized, myalgia.

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