AQA GCSE Biology

The eye

AQA GCSE Biology revision on The eye. Aligned to the AQA GCSE Biology 8461 specification. This bank has 25 practice questions on this topic.

Sample questions (3 of 25)

Question 1

Which part of the eye is responsible for changing the shape of the lens to focus on objects?
- A) The ciliary muscle
- B) The suspensory ligament
- C) The iris tissue structure
- D) The sclera outer layer
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Answer: The ciliary muscle

The ciliary muscles work in conjunction with the suspensory ligaments to adjust the refractive power of the lens. When the ciliary muscles contract, the suspensory ligaments slacken, allowing the lens to become thicker for focusing on near objects.
Question 2

What is the primary function of the iris within the eye?
- A) To focus light onto retina
- B) To control pupil diameter
- C) To transmit nerve signals
- D) To protect the inner eye
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Answer: To control pupil diameter

The iris contains circular and radial muscles that adjust the size of the pupil. By constricting or dilating the pupil, the iris manages the intensity of light that reaches the retina to prevent damage or allow vision in low light.
Question 3

Which condition occurs when the eyeball is too long, causing light to focus in front of the retina?
- A) Hyperopia vision defect
- B) Myopia vision condition
- C) Cataract lens clouding
- D) Astigmatism curvature
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Answer: Myopia vision condition

In myopia, the distance between the lens and the retina is too great, so images of distant objects are focused in front of the retina. This results in blurred distance vision, which can be corrected using a concave lens.

Want to test yourself on the remaining cards for this topic?

22 more questions on The eye — plus mistakes tracking and spaced repetition across the whole Biology spec.

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