Structure of the eye - image description

This diagram is a side view showing the structure of the eye. At the front of the eye is the cornea, which is where light first enters the eye. The light that enters through the cornea then passes through an opening called a pupil, which is an opening in the coloured part of your eye that is called the iris. Behind the iris sits the lens, which controls how well you can focus on images.

The optic nerve, which is located at the back of the eye, transmits images from the retina, which is also located at the back of the eye, to the brain.