List two main causes of a person developing near sightedness. Show with the help of a ray diagram how this defect can be corrected.
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List two main causes of a person developing near sightedness. Show with the help of a ray diagram how this defect can be corrected.
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Answer:
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 .
Explanation:
We can start:-
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 :
Note :-