why a convex lens is there in the eye and not a concave lens?
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Our eyes have crystalline lens, it is convex
If a person is suffering from an eye defect is should use lenses to correct it.
Well it depends on the problem you are suffering:-
If you are suffering from Miyopia(Short-sighted Ness) ,who's far point is less than infinity he should use concave lens( Diverging Len).Myopia can be caused by:-Due to high converging power of eye-lenses because of its short focal length.Due to a Eye-Ball being too long.If a person is suffering from hypermetropia( long-sightedness, near point is more than 25 centimetre) he should use convex lens(converging lens)Hypermetropia can be caused by:-Due to Low converging power of eye lenses ( Because of its large focal length ).Due to Eye-Ball being too short.If a person if suffering from both the condition is called presbyopiaGenerally caused due to old ageIt is corrected by using bifocal lenses( It is both concave and convex)Well my eye is 6/6 I don't wear any lens.hope you like!!!!!!!!
If a person is suffering from an eye defect is should use lenses to correct it.
Well it depends on the problem you are suffering:-
If you are suffering from Miyopia(Short-sighted Ness) ,who's far point is less than infinity he should use concave lens( Diverging Len).Myopia can be caused by:-Due to high converging power of eye-lenses because of its short focal length.Due to a Eye-Ball being too long.If a person is suffering from hypermetropia( long-sightedness, near point is more than 25 centimetre) he should use convex lens(converging lens)Hypermetropia can be caused by:-Due to Low converging power of eye lenses ( Because of its large focal length ).Due to Eye-Ball being too short.If a person if suffering from both the condition is called presbyopiaGenerally caused due to old ageIt is corrected by using bifocal lenses( It is both concave and convex)Well my eye is 6/6 I don't wear any lens.hope you like!!!!!!!!
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Light rays converge on the retina after passing through the lens of your eye because it is convex. The image forms upside down on the retina because no object can be closer than the focal point ( F ) of your eye lens. All objects placed beyond F will produce inverted, real images (for convex).
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