Question

write a short note on myopia and hyper metropia

Answer 1

Hey friend !!

Here is your answer..

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MYOPIA :

It is a defect due to which the eye is unable to see the distant objects clearly although it can see the nearby objects.

Causes :

1). The eye lens becomeso more convergent that is decrease in the focal length of lens.

2). Elongation of eye ball.

Correction :

It can be corrected by making the eye lens more convergent, which can be done by placing a concave lens of suitable focal length.

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HYPERMETROPIA :

It is the defect due to which the eye is unable to see clearly the nearby objects although it can see distant objects clearly.

Causes :

1). Increase of the focal length of the eye lens.

2). Shortening of the eye ball.

Correction :

It can be corrected by using convex lens of suitable focal length.

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Hope it helps.

#pragya_singh

Answer 2

myopia : it is the defect of eyes in which a person can see the near objects clearly but cannot see the distant object clearly without any strain.
causes of myopia are : i) elongation of eye ball
ii) decrease in focal length
this defect can be corrected by using concave lens of suitable power.



Hypermetropia: it is the defect Of eye in which a person can see the distant objects clearly but cannot see the near objects clear without any strain.
causes of hypermtropia : i) shortening of eye ball
ii) increase in the focal length.

this defect can be corrected by using convex lens of suitable power


I hope this helps u mate! :)