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← Human Body & HealthWhy does focusing on a distant object after prolonged close-up work temporarily blur vision, involving the ciliary muscle?
A)Cornea shape resists rapid changes
B)Pupil dilation lags accommodation speed
C)Ciliary muscle spasm prevents relaxation✓
D)Vitreous humor distorts image projection
💡 Explanation
The temporary blurriness arises because the ciliary muscle, contracted for near vision, experiences a spasm and resists relaxing fully to accommodate far vision. Therefore, distant objects appear blurred rather than the cornea, pupil, or vitreous humor being primary factors.
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