Edexcel IGCSE Biology · Spec 2.91-2.92
The Eye
The parts of the eye, how the eye focuses on near and far objects (accommodation), and the pupil reflex.
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The Eye
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Spec 2.91-2.92
What you need to know
- Label the parts of the eye
- Explain how the eye focuses light
- Describe the pupil reflex
Active recall
Quick check
Answer each question before opening the answer.
How does the eye focus on a near object (accommodation)?
Ciliary muscles contract, suspensory ligaments slacken, and the lens becomes fatter/more convex.
What happens to the pupil in bright light?
Circular muscles of the iris contract and the pupil gets smaller (constricts) to protect the retina.
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