SIGHT. The Eye-Definitions

1. It's a transparent dome, sits in front of the colored part of the eye.

• retina

• eyelid

• cornea

2. It is the colored part of your eye. So if someone has brown eyes, it means that person's irises are brown.

• optic nerve

• iris

• sclera

3. It's in the very back of the eye. It holds millions of cells that are sensitive to light. It takes the light the eye receives and changes it into nerve signals so the brain can understand what the eye is seeing.

4. It protects the front part of the eye. It helps to keep the eye clean and moist by opening and shutting several times a minute.

• optic nerve

• eyelid

• sight

5. __________ is the great messenger in the back of your eye. It carries millions of messages from the eye to the brain.

• blind

• sclera

• optic nerve

6. __________sits behind the iris and is clear and colorless. Its job is to focus light rays on the back of the eyeball.

• lens

• optic nerve

• noise

7. ________is the opening in the centre of the eye.

When more light is needed, it is made larger. In brighter light, it is made smaller.

• eyelid

• organ

• pupil