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← Human Body & HealthWhich process explains why reading small print requires brighter light as a person ages, despite the eye's lens remaining transparent?
A)Increased vitreous humor viscosity
B)Reduced retinal cone cell density
C)Decreased ciliary muscle contractility✓
D)Elevated intraocular fluid pressure
💡 Explanation
Presbyopia develops because the ciliary muscle's ability to contract and change the lens shape declines with age, reducing accommodation. Therefore, focusing on near objects becomes harder, rather than due to retinal changes or fluid pressure; this requires increased light to improve contrast.
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