Myopia is corrected by using

The correct answer is option 2, i.e. Myopia is caused due to excessive curvature of the eye lens and can be corrected by using a concave lens.

• Myopia:
  • Also known as near-sightedness.
  • The far point is nearer than infinity.
  • A person with this defect can see nearby objects but cannot see distant objects distinctly.
  • Image of the distant object is formed in front of the retina.
  • Arise due to - (a) excessive curvature of the eye lens, (b) elongation of the eyeball.
  • Correction - concave lens of suitable power.

• Hypermetropia:
  • The focal length of the eye lens is too long and can be corrected by the convex lens of suitable power.
• Presbyopia:
  • Decreases the power of accommodation and can be corrected by using bi-focal lenses.