Question

how many types of defects in vision you know in human beings? enlist them all with its cause and method of its rectification?​

Answer 1

Answer:

There are 3 types of defects in vision:_

1. Myopia
2. Hypermetropia
3. Cataract

Explanation:

1. Myopia-   Myopia is that defect of eye due to which a person can't see the distance object clearly (thought he can see the nearby object clearly).
2. Hypermetropia- Hypermetropia is that defect of eye due to which a person can't see nearby object clearly(thought he can see the distance object clearly)
3. Cataract- The medical condition in which the lens of eye of a person becomes progressively cloudy resulting in blurred vision is called Cataract.