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Refraction of light in the eye occurs at

1. The pupil only
2. The cornea only
3. The lens only
4. Both the cornea and the lens

Correct answer: Both the cornea and the lens

Solution

Most of the eye’s refraction happens at the cornea because of the large change in refractive index between air and the eye. The lens also refracts light to fine-tune focus on the retina, so both structures are involved.

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