Lens - a transparent substance on the surface of the eye with curved sides for concentrating or dispersing light rays
Pupil - is a hole located in the center of the iris of the eye that allows light to strike the retina
Dilate - to increase in size
Contract - to decrease in size
Pupil - is a hole located in the center of the iris of the eye that allows light to strike the retina
Dilate - to increase in size
Contract - to decrease in size
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