What is presbyopia? how to correct it?

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Answer

This defect is mainly found  in old persons who have lost their accommodation power due to old age and cannot see near object as well as far object. This defect of vision is corrected by using bifocal spectators.

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Presbyopia is eye defect in which a person is unable to see both near and far object it mainly happens to old or aged people
we can correct it by using bifocal lens or surgery

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Presbyopia is the normal loss of near focusing ability that occurs with age. Most people begin to notice the effects of presbyopia sometime after age 40, when they start having trouble seeing small print clearly — including text messages on their phone.

Eyeglasses with progressive lenses are the most popular solution for presbyopia for most people over age 40. These line-free multifocal lenses restore clear near vision and provide excellent vision at all distances, regardless of what refractive errors you may have in addition to presbyopia.Reading glasses are another choice....

I hope it will help u.....

Answer

It is found in old people.For most of the people point gradually recedes away with age. Sometimes ,a person may suffer from both myopia and hypermetropia .
causes:-
This defect arises due to the following reasons:_
1) weakness of ciliary muscles,
2)Hardening or loss of elasticity of eye lens.
Remedy:-This defect can be corrected by using bifocal or varifocal lenses which consist of both convex n concave lenses.The upper portion consists of a concave lens and lower portion consists of convex lens.

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Heyya.... Presbyopia is that defect of vision on which an old person cannot see nearby object clearly due to loss of accommodation of power...... It is corrected by using spectacles having convex lens.. :-)

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Presbyopia is a defect of vision in which person cannot see both far object as well as near object

》Presbyopia is vision defect when the ability of accomodation of eye decreases with ageing.This happens dueto the weakening of the ciliary muscles and diminished flexibilityof the eye lens

》A bifocal lens is used to correct presbyopia.Its upper portion consists of concave lens and lower portion consists of convex lens

Answer

Presbyopia is caused due to the gradually weakening of cilliary muscles and decrease in the flexibility of eye less. In this case the person near point recedes away and the far point comes two nearer . It is corrected using bifocal lens

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A girl can see distant objects clearly but cannot see an object situated close to her eye. She is suffering with

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The human eye can focus on objects at different distances by adjusting the focal length of the eye lens. This is due to (

Bi-focal as it is clear that is has two focal length when a person. Is suffering from presbyopia he can't see the nearby as well as farby object in a bi-focal lens the bottom one lens is the concave lens whereas the upper one is the convex lens?

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