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Light

Across
The back surface of the eye that is made up of rods and cones
A membrane that protects the eye
Blocks light completely
Is a clear material that has at least one curved surface that refracts light
The bouncing of light off of a surface
Light passes through easily
The bending of light
This nerve carries information to the brain about the light that strikes the retina
Down
To pass through
A piece of clear glass which refracts light into a rainbow
Material changes light energy into heat energy
Lets some light through
The opening in the eye that gets bigger and smaller as it adjusts to light
Is a very smooth surface that forms images by reflecting light
A colored part of the eye that controls the size of the pupil