[Video] Your Eye Structure

From Cells to Atoms

The structure of the eye can be divided into several main parts:

Cornea

This is the clear, outermost layer of the eye that helps to focus light as it enters the eye.

Iris

This is the coloured part of the eye that helps to control the amount of light that enters the eye by adjusting the size of the pupil.

Pupil

This is the black, circular opening in the centre of the iris that allows light to enter the eye.

Lens

This is a clear, flexible structure that sits behind the iris and helps to focus light onto the back of the eye.

Retina

This is the innermost layer of the eye that contains the photoreceptors, which are responsible for converting light into electrical signals.

Optic nerve

This is the nerve that carries electrical signals from the photoreceptors in the retina to the brain, allowing us to see.