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10 terms

6th grade Science - chapter 4.4

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how do you see objects?
...a process that occurs that involves both your brain and your eyes
cornea
..., the transparent front surface covering of the eye where light enters
pupil
..., the adjustable opening in the center of the eye through which light enters
iris
...ring of muscle that contracts and expends to change the size of the pupil
retina
...layer of cells that lines the inside of the eyeball
rods
...cells that contain a pigment that responds to small amounts of light
cones
...cells that respond to color
optic nerve
...a thick neve that the rods and cones send signals to the brain through
nearsighted
...a person that can see nearby things clearly, but objects at a distance are blurred
farsighted
a person that can see distant objects clearly, but nearby objects appear blurry...