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1

When the pupil of the eye , it increases the amount of visual detail we are able to see.
2

The lens focuses light by changing its own thickness, a process called .
3

receive information directly from the rods and cones and communicate that information to the ganglion cells.
4

is a complex, reddish-purple substance whose composition changes chemically when energized by light.
5

The optic nerves from each eye meet at a point roughly between the two eyes called the , where each optic nerve then splits.
6

Many neurons in the cortex are extraordinarily specialized, being activated only by visual stimuli of a particular shape or pattern—a process known as .





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