# Explain why a person with long-sightedness cannot see near objects clearly, and describe how a corrective lens fixes this problem.

> AQA A-Level Physics (7408) — 3.10.1 Physics of the Eye · Explain · 5 marks

> A person struggles to read a book held at normal reading distance but can see distant objects clearly.

## Mark scheme (5 marks)

1. In long-sightedness, the eyeball is too short (or the lens cannot converge light sufficiently)
2. Light from a near object would be brought to a focus behind the retina
3. The image on the retina is therefore blurred / not a sharp image
4. A converging (convex) lens is used as the corrective lens
5. The converging lens refracts light rays inward before they enter the eye, so that the image is brought forward onto the retina

## Key terms

- [long-sightedness](https://www.gradenine.co.uk/glossary/long-sightedness)

## Related

- [Revision notes for AQA A-Level Physics (7408)](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-why-a-person-with-long-sightedness-7d5e546c) · Published by Druglandscape Ltd.