Structure of the eye - image description

This diagram is a side view showing the structure of the eye. At the front of the eye a thin layer, called the conjunctiva, covers the eye. Directly behind this 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. Below the iris are the ciliary body and the choroid. These three together form the middle layer around the eyeball called the uvea. Behind the iris sits the lens, which controls how well you can focus on images.