Which defect of vision occurs due to the weakening of ciliary muscles with age?

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RRB JE ECE 22 Apr 2025 Shift 1 CBT 2 Official Paper
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  1. Astigmatism
  2. Hypermetropia
  3. Myopia
  4. Presbyopia

Answer (Detailed Solution Below)

Option 4 : Presbyopia
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The Correct answer is Presbyopia

Key Points

  • Presbyopia is a defect of vision that typically occurs with age, especially after the age of 40.
  • This condition is caused by the weakening of the ciliary muscles, which are responsible for changing the shape of the eye's lens to focus on objects at different distances.
  • As the ciliary muscles become less flexible with age, the ability to focus on nearby objects diminishes, causing difficulty in reading and performing close-up tasks.
  • Presbyopia is often corrected with reading glasses or bifocal lenses, which help improve near vision.
  • Unlike other refractive errors, presbyopia is a natural part of the aging process and is not caused by external factors like injury or disease.

 Additional Information

  • Astigmatism
    • Astigmatism is a refractive error where the cornea or lens is irregularly shaped, causing blurry vision at all distances.
    • This condition is typically corrected using glasses or contact lenses that compensate for the irregular curvature.
    • Unlike presbyopia, astigmatism can affect individuals at any age, and it is not related to aging.
  • Hypermetropia (Farsightedness)
    • Hypermetropia is a condition where distant objects are seen more clearly than nearby objects.
    • This occurs when the eye is too short, or the cornea has too little curvature, causing light to focus behind the retina.
    • Hypermetropia can be corrected with glasses or contact lenses that focus light onto the retina.
  • Myopia (Nearsightedness)
    • Myopia is a condition where nearby objects are seen clearly, but distant objects appear blurry.
    • This occurs when the eye is too long, or the cornea has too much curvature, causing light to focus in front of the retina.
    • Myopia is typically corrected with glasses or contact lenses that adjust the focal point to the retina.

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