Activity Sheet #1: How the Eyes Work

Below is a drawing of the eye with some of the more important parts numbered.
Write the names of the parts of the eye and their functions in the proper boxes.
The clue list is there to help you.

Number	Part Name	Function
1
2
3
4
5
6
7

 

Part Names		Functions
Lens		Contains cells that detect light
Retina		Opening to the inner eye
Ciliary Muscle		Controls the size of the pupil
Optic Nerve		Focuses image of object
Pupil		Controls shape of lens
Cornea		Transmits information to brain
Iris		Outermost transparent layer of eye, begins focusing process

ANSWERS:
1. Cornea. Outermost transparent layer of eye. Begins focusing process.
2. Pupil. Opening to the inner eye.
3. Iris. Controls size of pupil.
4. Lens. Focuses image of object (on retina).
5. Retina. Contains cells that detect light.
6. Ciliary muscle. Controls shape of the eye.
7. Optic Nerve. Transmits information to the brain.