Give one cause of near-sightedness (myopia).
(N/A) One of the primary causes of near-sightedness (myopia) is the excessive curvature of the eye lens,which leads to a decrease in its focal length. This causes the image of a distant object to be formed in front of the retina rather than on it.
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$A$ person cannot see objects farther than $12\, m$ from the eye clearly. Name the defect of vision he is suffering from and the lens that should be used for correction of this defect. Illustrate with the help of a diagram,how this lens will correct the defective vision?
Medium
View Solution$A$ person needs a lens of power $-4.5\, D$ for the correction of her vision.
$(a)$ What kind of defect in vision is she suffering from?
$(b)$ What is the focal length of the corrective lens?
$(c)$ What is the nature of the corrective lens?
$(a)$ What kind of defect in vision is she suffering from?
$(b)$ What is the focal length of the corrective lens?
$(c)$ What is the nature of the corrective lens?
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View SolutionWhat is another name for the defect of myopia?
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View SolutionWhat is near-sightedness?
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View SolutionWhat is meant by the far point?
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