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Human Eye Anatomy
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Human Eye Anatomy
Explore how the eye’s structures work together to form vision. Use the descriptions and clues in Questions 1–3, then solve the clinic challenges. Write your answers in the spaces provided.
Inside the eye
Use the descriptions in each question to identify structures and trace the route of light.
1.The transparent curved surface at the front of the eye bends incoming light before it reaches the lens. Name this structure.
2.Which structure controls the size of the pupil and therefore how much light enters the eye?
- Retina
- Iris
- Optic nerve
- Vitreous humour
3.Trace the path of light from the front of the eye to the light-sensitive layer at the back. Put these structures in the correct order: retina, cornea, pupil, lens.
Vision in action
Apply your understanding to situations an optometrist might investigate.
4.A student shifts their gaze from a distant sign to a nearby phone. Explain how the lens changes shape to focus the phone clearly on the retina.
5.Complete the explanation: Photoreceptor cells in the retina convert light into impulses, which travel along the to the brain.
6.Match each structure to its main role.
- Retina
- Optic nerve
- Iris
- Lens
- Carries impulses towards the brain
- Contains photoreceptors that detect light
- Changes pupil size
- Refracts light and adjusts focus
7.True or false? In bright light, the circular muscles of the iris contract and the pupil becomes smaller, reducing the amount of light entering the eye.
TrueFalse
8.A patient has a damaged optic nerve, but their cornea and lens still focus light normally. Explain why they may still have impaired vision.
9.Tears and blinking help protect the eye. Give two ways they help keep the eye working effectively.
10.A learner says, “The pupil is a black structure that detects light.” Correct both errors in this statement.
2 printable pages
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