Question

state two main cause of a person developing short sightedness how can this defect be corrected

Answer 1

$\huge \bf \pink{Hey \: there !!}$



$\huge \boxed{ \boxed{ \orange{ \bf \underline{Myopia }}}}$

→ Myopia is also called as Short - sightedness .

→ Myopia is that defect of vision due to which a person cannot see the distant object clearly.

→ It means that he can see the nearby objects clearly .


→ The defect of eye called myopia [ Short - sightedness ] is caused due to : 

(i) Due to high converging power of eye-lens ( because of its short focal length ) .

(ii) Due to eye-ball being too long .


→ Myopia is corrected by using spectacles containing concave lenses .


$\bf \underline{Note :- }$

1. The far point of an eye suffering from myopia is less than infinity.

2. The concave lens used for correcting myopia should be of such a focal length that it produce a virtual image of the distant object and the far point of the myopic eye.

3. The whole purpose of using a concave lens is used to reduce the converging power of eye-lens



THANKS


#BeBrainly.

Answer 2

Two main cause of a person developing short sightedness are :-

1. Due to high converging power of eye-lens.

2. Due to eye-ball too long .


→ It is corrected by using concave lens.