OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

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Study for the OCR GCSE Biology Exam. Use multiple choice questions and quiz flashcards with explanations and hints. Excel in your exams!

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

Night blindness
Glaucoma
Long sightedness
Astigmatism

The correct answer is: 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.