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| Description: (A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at close range. (B) In myopia, light rays focus in front of the retina, making it difficult to focus on objects that are far away. (C) In astigmatism, light rays do not uniformly focus on the eye due to abnormal curvature of the cornea or lens. (D) In presbyopia, the aging lens becomes rigid and is unable to focus light from close objects.
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