2. Imagine closely viewing a red pencil with its sharpened lead tip pointing upward and the eraser at the other end pointing downward. Describe how incoming light is reflected by the pencil is focused on the retina, and describe the location of the visual receptor cells that convert the light energy into neural impulses. Describe the pathway by which these neural impulses are forwarded to the optic nerve and onto the brain's visual processing centers, which enable you to perceive an image of a red pencil.

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