1. The Eye

2. focuses light rays to produce objects
The Eye
focuses light rays to produce objects

3. The Brain

4. Neuron

5. slightly longer than wide
round
slightly longer than wide
eyeball

6. 1. Sclera - outer protective layer
3 layers of tissue
1. Sclera - outer protective layer
cornea
aqueous
humor
* Cornea - lets light in
* Aqueous Humor - fluid filled chamber

7. 2. Choroid Layer
Middle layer that contains blood vessels
* iris - colored portion of eye
*pupil - opening through which light enters
* lens - focuses light rays
* vitreous humor - jellylike fluid, gives round shape

8. 3. Retina
Light is focused here

9. * Located in the retina Rods - react to dim light
Rods & Cones
* Located in the retina
Rods - react to dim light
Cones - responsible for color vision, don’t work in dim light

10. Image that appears on retina is
upside down

11. The Brain must turn
right side up

12. Eye Structure sclera choroid optic nerve cornea pupil retina lens iris
vitreous humor
aqueous humor

13. External Eye
pupil
sclera
iris

15. convex lens
converges
hypermetropia
= farsightedness

16. concave lens
diverges
= nearsightedness
myopia