Question

Identify the defect of vision in each of the following cases and
suggest its corrective measure :
(i)
The eye lens has become milky and cloudy.
(ii)'
The eye lens has excessive curvature.
(iii)
The eye lens has large focal length (longer than normal).
(iv)
Ciliary muscles have weakened.​

Answer 1

Answer:

iv) ciliary muscles have weakened

Answer 2

1. cataract

2. myopia

3. hypermetropia

4.presbyopia

Explanation:

Cataract -

It refers to the condition , when the eyes lens gets partially or completely covered with some cloud substance , is referred to as cataract , the situation is usually observed in old ages , and an be operated easily .

Myopia -

It refers to the condition , when the person easily see near by object clearly , but is not able to see far away objects clearly , is referred to as myopia , and occurs due to excessive curvature .

Hypermetropia -

It refers to the condition , when the person easily see far away object clearly , but is not able to see near by objects clearly , is referred to as myopia , it is occurs due to larger focal length .

presbyopia -

It refers to the medical condition , when the person is not able to see the near by as well as the far away object clearly , is referred to as presbyopia , the condition is mostly observed in old age , which is due to weak ciliary muscles .

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