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Q.

What is the function of ciliary muscles?

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Detailed Solution

Ciliary muscles change the curvature of the eye lens to focus light on the retina, enabling near and distant vision (accommodation).

How accommodation works

  • For near objects: ciliary muscles contract, suspensory ligaments relax, lens becomes thicker, focal length shortens.
  • For distant objects: ciliary muscles relax, ligaments tighten, lens thins, focal length increases.

Outcomes

  • Sharp image formation on the retina.
  • Reduced eye strain when functioning well.
  • Age-related decline leads to presbyopia.
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