1. Sight

2. What does it mean to “see”?
You see an image if it reflects light to your eyes.
This process lets your brain form an image.

3. Parts of the eye The Cornea A clear membrane that protects the eye.
Allows light to enter.

4. Parts of the eye The Pupil
The opening in the eye that light enters through.
Can contract or expand in relation to the amount of light available.

5. Parts of the eye The Retina A layer of light sensitive cells
Packed with photoreceptors
Rods
Sensitive to dim light
Important for night vision
Cones
Sensitive to bright light
Allows you to see colors and fine details

6. Finding Your Blind Spot

7. Parts of the eye
The photoreceptors change light into electrical impulses.
Send the impulses to the optic nerve at the back of the eye.
Carries the impulses to your brain.

8. Do you wear glasses or contacts?