The iris is like the aperture part of a camera, which used to also be called the iris.
The pupil of the eye can be likened to a camera aperture. Just as an aperture controls the amount of light entering a camera, the pupil regulates the amount of light entering the eye.
The focusing lens of the camera
The part of the eye that is similar to the shutter in a camera is the iris. It regulates the amount of light entering the eye by adjusting the size of the pupil, functioning like a camera's aperture to control the amount of light reaching the retina.
The iris acts like the aperture of a camera lens.
The pupil is the center round black part of the eye. This is where the light enters into the retina. The human pupil works much like the aperture of a camera.
The aperature can control the amount of light that comes into the camera just like the pupil of the eye.
That part is called as pupil. Through this aperture the light goes in to retina.
The shutter acts like the iris of the eye because it lets the proper amount of light.
The eye lids.
It is identical in action to the iris in your eye, it widens and narrows to allow only the required amount of light through the aperture hole/pupil
The letter is I. Eyes are part of the head.