Why does accommodation lag during near-far focus shifts increase with age, contributing to presbyopia?

💡 Explanation

Accommodation lag increases due to age-related loss of lens elasticity and increased rigidity of the sclera, impacting the ciliary muscle's ability to effectively change the lens shape. Because the sclera resists deformation by the ciliary muscle, therefore the eye cannot focus on nearby objects, rather than due to changes in the cornea, tear film, or lens protein scattering.

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