Question

What is presbyopia write two causes of this defect. Name the type of lens which can be used to connect presbyopia

Answer 1

it is a condition in which we won't be able to see things clearly
it's normally seen in oldage people because their lense loose the ability to change shape to focus light(children are not effected by such condition because they have soft and flexible lense)
As we get older muscles makes the lense harder
LASIK surgery can be done or it can be diaognised

Answer 2

Here is your answer..

What is Presbyopia ? 

Presbyopia is the defect of vision. During this, people find it difficult to see the nearby objects clearly and comfortably without their spectacles, Because the near point of the lens shifts farther from the eye.Hence old people cannot see nearby objects clearly.

This defect can be corrected by using a convex type of lens of suitable focal length. 

This is all about Presbyopia.