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

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.