What is cataract? How the vision of person suffering from cataract is restored?

Academic Physics NCERT Class 10

A person is said to have developed a cataract when the eye lens becomes progressively cloudy resulting in blurred vision.

The vision of a person suffering from cataract can be restored with surgery. The opaque lens is removed from the eye by surgical operation and a new artificial lens is inserted in its place.

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Updated on: 10-Oct-2022

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When is a person said to have developed cataract in his eye? How is the vision of a person having cataract restored?
A person cannot see the distant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision called:(a) cataract (b) hypermetropia (c) myopia (d) presbyopia
The defect of vision in which the eye-lens of a person gets progressively cloudy resulting in blurred vision is called:(a) myopia (b) presbyopia (c) colourblindness (d) cataract
Person suffering from cataract has(a) elongated eyeball (b) excessive curvature of eye lens(c) weakened ciliary muscles (d) opaque eye lens
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Name the type of defect of vision a person is suffering from, if he uses convex lenses in his spectacles for the correction of this vision.
How is the white cloudy substance is formed behind the eye lens, that causes cataract disease?
What is the far point of a person suffering from myopia (or short-sightedness)?
After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles:Left eye : + 2.00 D Right eye : + 2.25 DThe child is suffering from the defect of vision called:(a) short-sightedness (b) long-sightedness(c) cataract (d) presbyopia
A person needs a lens of power $-4.5\ D$ for 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?
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