Learning objective

Describe how accommodation occurs to focus on near and far objects, involving the contraction and relaxation of ciliary muscles, tension in the suspensory ligaments, lens shape, and light refraction.

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Exam focus

Cambridge IGCSE BiologyCoordination and responseSupplement content

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Quick explanation

This point belongs to Sense organs, especially Sense organs outcomes.
You need to be able to describe how accommodation occurs to focus on near and far objects, involving the contraction and relaxation of ciliary muscles, tension in the suspensory ligaments, lens shape, and light refraction.
The key ideas to know are Explain.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Explain

Why it matters

This objective helps connect Sense organs outcomes to exam-style questions, flashcards, and revision notes for Sense organs.

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Practice Questions7 linked questions

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Paper 4Theory (Extended)3 marks

Diagram Description

The diagram shows the ciliary muscles contracted, suspensory ligaments slack, and the lens thick and curved.

a
Explain how accommodation occurs when focusing on a near object.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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