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1

The lens focuses light by changing its own thickness, a process called .
2

The part of the eye that converts the electromagnetic energy of light to electrical impulses for transmission to the brain is the .
3

are thin, cylindrical receptor cells that are highly sensitive to light, whereas are light-sensitive receptor cells that are responsible for sharp focus and color perception.
4

Many neurons in the cortex are extraordinarily specialized, activated by visual stimuli of a particular shape or pattern. This is a process known as .
5

The theory of color vision suggests that receptor cells are linked in pairs, working in opposition to each other.





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