Eyes

Your eye is like a camera

1. Light enters the eye through a small ______________ called the pupil and is focused on the retina, which is like a camera film.

2. The eye also has a focusing _______________ which focuses images from different distances on the retina.

3. The coloured ring of the eye, the iris, controls the ______________ of light entering the eye.

4. It closes when light is _____________ and opens when light is dim.

5. A tough white sheet called sclera covers the outside of the eye. The front of this sheet (sclera) is transparent in order to allow the light to enter the eye, the cornea.

6. Ciliary muscles control the focusing of lens automatically.