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Different lights do make me strange, thus into different sizes I will change.

Illustration for riddle: Different lights do make me strange, thus into different sizes I will change.

Common Wrong Answers

Lens

While the lens in the eye changes shape to focus light, it does not change size based on light conditions like the pupil does.

Iris

The iris controls the size of the pupil but does not change size itself; it is the pupil that actually changes size in response to light.

Cornea

The cornea helps focus light entering the eye but does not change size with different light levels, unlike the pupil.