Question

Crystalline lens of people at old age becomes milky and cloudy. This condition is called
1. myopia
2. hypermetropia 
3. cataract
4. presbyopia

Answer 1

Correct Answer - Option 3 : cataract

Concept:

• Cataract: A cataract is a clouding and milkiness of the eye's natural lens, which lies behind the iris and the pupil.
  • This can be corrected only by the surgery.

Different types of eye defects and their corrections:

Defects of Vision	Details	Corrections
Myopia or Near-sightedness	The eye can see nearby objects clearly but the distant objects appear indistinct.	Concave Lens
Hypermetropia or Farsightedness	The human eye can see Distant objects clearly but cannot see nearby objects distinctly.	Convex Lens
Presbyopia	People suffer from near-sightedness as well as farsightedness.	bifocal lenses
Cataract	People suffer from the cloudiness of lens which causes a decrease in vision.	Surgery

Explanation:

• From the above discussion, we can see that when the eye lens of people at old age becomes milky and cloudy. This condition is called the formation of Cataract.