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← Human Body & HealthWhy does accommodation reflex failure, linked to presbyopia, increasingly impair an aging accountant's ability to discern numbers on a close-range ledger, versus distant monitors?
A)Ciliary muscle tone increases excessively.
B)Pupillary constriction enhances depth perception.
C)Retinal sensitivity boosts near vision.
D)Lens elasticity declines, impeding accommodation.✓
💡 Explanation
Presbyopia occurs because the crystalline lens loses its elasticity, thereby hindering the ciliary muscles' ability to change lens shape for near focus. Therefore, near vision degrades with age, rather than distant vision, because the lens cannot accommodate.
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