AQA GCSE Biology · 8461
Specification 4.5.2.3 · Paper 2
Revise: Vision Defects and CorrectionsTwo common defects are myopia and hyperopia.
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GCSE Biology · key term
A defect of vision in which light from a near object would come to a focus behind the retina, making near objects appear blurred.
Used by AQA
Specification 4.5.2.3 · Paper 2
Revise: Vision Defects and CorrectionsTwo common defects are myopia and hyperopia.
On a ray diagram, locate the retina and the point where the rays meet before naming the defect: in front means myopia; behind means hyperopia.
Check the lens shape as well as its name: a concave lens is thinner in the middle and corrects myopia; a convex lens is thicker in the middle and corrects hyperopia.
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