OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

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Prepare for the OCR GCSE Biology Exam with detailed quizzes, flashcards, and explanations. Enhance your understanding of biology concepts and get exam-ready today!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is the primary function of the cornea in the eye?

To control the amount of light entering
To refract light into the eye
To focus light on the retina
To protect the eye from damage

The correct answer is: To refract light into the eye

The primary function of the cornea is to refract light into the eye. The cornea is the transparent front layer of the eye that covers the iris and pupil. Its curved shape and the fact that it is denser than the air around it allow it to bend (or refract) incoming light rays. This bending is crucial as it helps to direct light towards the retina, facilitating clear vision. While the cornea does play a role in protecting the eye and contributes to focusing light alongside the lens, its main job is definitely related to the refraction of light as it enters the eye, which ensures that images are properly directed for interpretation by the vision system.