2. The Eye

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

4. The Brain
The eye is connected to the brain via the optic nerve. Images are interpreted by the occipital lobe

5. Neuron
Interneurons carry the message along the optic nerve to the brain.

6. slightly longer than wide
round
slightly longer than wide
eyeball

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

9. 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

10. 3. Retina
Light is focused here

12. * 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

14. Image that appears on retina is
upside down

15. The Brain must turn
right side up

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

17. External Eye
pupil
sclera
iris

19. convex lens
converges
hypermetropia
= farsightedness

20. concave lens
diverges
There is a “cave” near the school
= nearsightedness
myopia