# Explain how the eye is able to focus clearly on a nearby object, referring to the ciliary muscles, suspensory ligaments and lens.

> Cambridge International IGCSE Biology (0610) — 14.2 Sense organs · Explain · 4 marks

## Mark scheme (4 marks)

1. The ciliary muscles contract when focusing on a near object.
2. The suspensory ligaments relax / become slack.
3. The lens becomes fatter / more curved / more convex.
4. This causes light to be refracted more / focused onto the retina.

## Key terms

- [ciliary muscle](https://www.gradenine.co.uk/glossary/ciliary-muscle)
- [suspensory ligaments](https://www.gradenine.co.uk/glossary/suspensory-ligaments)
- [lens](https://www.gradenine.co.uk/glossary/lens)

## Related

- [Revision notes for Cambridge International IGCSE Biology (0610)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/explain-how-the-eye-is-able-1cbaeb38) · Published by Druglandscape Ltd.