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The eye switches from focusing on a distant television to focusing on a close up newspaper - OCR Gateway - GCSE Biology - Question 7 - 2019 - Paper 3

Question 7

The eye switches from focusing on a distant television to focusing on a close up newspaper. Which change happens to the suspensory ligaments and to the lens during ... show full transcript

Worked Solution & Example Answer:The eye switches from focusing on a distant television to focusing on a close up newspaper - OCR Gateway - GCSE Biology - Question 7 - 2019 - Paper 3

Step 1

Suspensory ligaments: tight to slack

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Answer

When focusing on a close object, the ciliary muscles contract, allowing the suspensory ligaments to become slack. This adjustment enables the eye to focus on nearer objects.

Step 2

Lens: thicker

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Answer

As the ligaments slacken, the lens becomes thicker due to the increased action of the ciliary muscles. A thicker lens is necessary for the increased refraction needed to focus light from close objects onto the retina.

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The eye switches from focusing on a distant television to focusing on a close up newspaper - OCR Gateway - GCSE Biology - Question 7 - 2019 - Paper 3

Worked Solution & Example Answer:The eye switches from focusing on a distant television to focusing on a close up newspaper - OCR Gateway - GCSE Biology - Question 7 - 2019 - Paper 3

Suspensory ligaments: tight to slack

Lens: thicker

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