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If Jessie studies economics for two hours instead of going to the movies with her friends,then
Pupil
The circular opening in the center of the iris of the eye, which regulates the amount of light that enters.
Lens
A transparent optical component that focuses or disperses light rays, used in a variety of devices such as glasses, cameras, and microscopes to enhance vision or capture images.
Opponent-Process Cell
A type of cell in the visual system that is believed to be responsible for processing colors by encoding differences between pairs of colors such as red-green or blue-yellow.
Thalamus
A large, dual-lobed mass of grey matter buried under the cerebral cortex, involved in relaying sensory information and acting as a center for pain perception.
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