2. Color  You see an object as the wavelength  ( color) of visible light that it reflects  Sunflowers are yellow because it reflects (bounces off) mostly the yellow wavelength into your eye  White: all colors of light spectrum are reflected  Black all colors of the light spectrum are absorbed

3. Your Eyes & Light  Cornea: the transparent front surface, light enters the eye through it  Iris: colored ring of muscle that contracts and expands to change the amount of light entering the eye

4. The Path of Light  Pupil: Part of the eye that looks black ( opening to the interior of the eye) becomes small in bright light and large in darkness to allow more light inside the eye  Lens found behind the pupil, is a convex lens, refracts light on the back wall of the eyeball.

5.  Retina: Layers of cells lining the eyeball. As the cornea and lens refracts light onto it, forming an image appears  (contains pigments called rods and cones)  Rods react to small amounts of light (distinguish between black, white, and shades of gray

6. Vision in Color Cones: has pigments that respond to colors ( only function in bright light) 3 Types of Cones detect red light detect green light detect blue light

7. Optic Nerve and Vision  Signals travel from the rods and cones along the optic nerve to the brain  The brain turns the image right side up and is combined into 2 images one from each eye to create a single 3D image

8. Vision Correction  Nearsightedness: Can see close up but distant objects are blurry(eyeball too long)  Farsightedness: Can see distant objects but close up objects are blurry(eyeball too short)