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Hypermetropia and Its Correction

How is presby...

Question

How is presbyopia different from hypermetropia?

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Solution

Farsightedness, or hyperopia, occurs when an irregularly-shaped eye prevents light from properly lining up with the retina. ... People of any age, including babies, can be farsighted.Presbyopia is an age-related condition in which the lens of the eye becomes less flexible.

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Q. 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

Q. The refractive defects of vision are
a. Myopia b. Cataract
c. Hypermetropia d. Presbyopia

Q. The defect of vision which cannot be corrected by using spectacles is :
(a) myopia (b) presbyopia (c) cataract (d) hypermetropia

Q. What is hypermetropia? What are the possible reasons of hypermetropia? How is hypermetropia corrected? Explain with figures.

Q. In presbyopia,the near point of the eye gradually recedes away. Thus it is a case similar to hypermetropia. The why shouldn't we use a convex lens to correct this defect instead of a bifocal lens?

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