OCR GCSE Biology Practice Exam 2025 – Comprehensive All-in-One Guide to Exam Success

Question: 1 / 1090

What visual issue arises from an incorrectly shaped lens in the eye?

Night blindness

Glaucoma

Long sightedness

An incorrectly shaped lens in the eye can lead to astigmatism, which results from an irregular curvature of the cornea or lens. This irregularity prevents light from focusing properly on the retina, leading to blurred or distorted vision at different distances. In astigmatism, the light rays do not converge at a single point, which affects visual clarity.

Long sightedness, or hyperopia, does involve lens shape but is primarily due to the eyeball being too short or the lens being too flat, which causes difficulty in focusing on nearby objects. While it is related to how light focuses in the eye, the direct visual issue from an incorrectly shaped lens specifically refers to astigmatism. Other options, such as night blindness and glaucoma, pertain to different eye conditions that are not directly related to the shape of the lens.

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Astigmatism

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