Iris: Function and Anatomy

KOMPAS.com – eye part The iris that regulates the amount of light that enters the eye is the iris.

The iris is the muscular portion that lies near the front between the outer cornea and the lens.

The iris regulates the amount of light that enters the eye by determining the size of the “window” or pupil of the eye.

Thus, the iris displays what is called the “pupillary light reflex”.

A number of health conditions can affect the iris. It can occur due to genetic disorders or other diseases.

Also read: 5 Important Kidney Functions for the Body

Reported from Verywell Health, Through dilation (opening) and narrowing (closing), the iris plays an important function, namely regulating the amount of light entering the eye and accessing the retina at the back of the eye.

When there is low light, the iris will widen to maximize available visual information and when it is very bright, the iris will narrow to prevent overloading of the visual sensory apparatus.

The former is carried out by the contraction of the radial muscles, while the latter activity involves the circular muscles.

This activity is regulated by the cortex and can be influenced by physiological states.

In addition, this structure performs the “accommodation reflex”, which is the involuntary eye’s ability to shift focus away from near or far objects.

Also read: Eustachian Tract: Function and Anatomy

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