| A | B |
|---|
| convex lens | thicker in the center |
| lens | transparent with one curved surface |
| focal point | point where light rays come together through a convex lens |
| concave lens | thicker at the edges |
| retina | light sensitve layer at the back of the eye |
| optic nerve | gets nerve impulses and send them to the brain so you see |
| near sighted | see things close well but not far away |
| far sighted | see things far but not close up |
| contact lenses | clear thin lenses that float on tears over your cornea |
| transparent | lets light through to see clearly |
| refract | bending of light as it passes through something |
| optometrist | doctor who checks your eyes for problems |
| opthalmologist | helps you choose the correct glasses |
