1. The Eye and Vision

2. Structure of the Eye Cornea- outer coating of the eye
Pupil and Iris- pupil allows light in, iris colored part
Lens – sealed capsule containing a clear fluid
Retina- inner surface of the eye covered with light sensitive nerve endings called rods and cones – convert light into electrical signals

4. Vision Problems
Nearsightedness- you can see things that are close to you- eyeball is too long
Corrected with concave lenses
Farsightedness – you can see things that are far away- eyeball is too short
Corrected with convex lenses
Astigmatism- objects at any distance appear blurry because the cornea or the lens is out of shape

5. Nearsightedness
Farsightedness