| A | B |
|---|
| Contraction | getting smaller |
| dilation | getting bigger |
| rods | A type of light-senstive cells which detect shades of gray (help you see at night). |
| blind spot | There are no rods or cones in this spot where the nerves leave the eye. |
| pupil | an adjustable opening in the iris (eye ball). |
| ligament | It connects the muscle to the lens. |
| fovea | One area of the retina. The cones are concentrated in this area. |
| retina | light-sensitive layer that lines the inside of the back of the eyeball |
| optic nerve | It sends the message from the eye to the brain. |
| cones | A type of light-sensitive cells which detect color (help you see colors). |
