make ray diagram to show how far sightedness is corrected by suitable lens. state 2 reasons of cause of myopia and hypermetropia ?
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Reason for Myopia
1.Eyeball is too long.
2.Decrease in focal length of eye lens.
Reasons for hypermetropia
1.The eyeball is too short
2.Eyeball is not sufficiently converging
1.Eyeball is too long.
2.Decrease in focal length of eye lens.
Reasons for hypermetropia
1.The eyeball is too short
2.Eyeball is not sufficiently converging
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