Which part of the eye primarily refracts light to help focus it on the retina?

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Explore Alberta's Grade 8 Science curriculum on Light and Optical Systems. Test your knowledge with engaging quizzes including flashcards and multiple choice questions. Prepare effectively for your exam!

Multiple Choice

Which part of the eye primarily refracts light to help focus it on the retina?

Explanation:
Light is bent as it enters the eye, and the cornea does most of this bending because of its curved, transparent surface. This initial refraction gives the eye most of its focusing power, sending a blurred image toward the back of the eye. The lens then changes shape to fine-tune that focus so the image lands sharply on the retina, especially as objects come closer or farther away. The iris and pupil control how much light gets in, but they don’t refract light. So the part that primarily refracts light to help focus it on the retina is the cornea.

Light is bent as it enters the eye, and the cornea does most of this bending because of its curved, transparent surface. This initial refraction gives the eye most of its focusing power, sending a blurred image toward the back of the eye. The lens then changes shape to fine-tune that focus so the image lands sharply on the retina, especially as objects come closer or farther away. The iris and pupil control how much light gets in, but they don’t refract light. So the part that primarily refracts light to help focus it on the retina is the cornea.

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