A company is creating an advertisement for colored contact lenses. In the ad, the company wants to include the phrase "Each contact lens is like a second ____.” Which part of the eye would be most accurate in completing the phrase?

The iris is the colored part of the eye, and colored contact lenses change how that part appears. So “a second iris” is the most accurate phrase. The pupil is the opening in the center of the iris, while the sclera is the white outer part of the eye and the retina is the light-sensitive layer inside the eye.

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