A far sighted person cannot focus distinctly on objects closer than "1m" What is the power of lens that will permit him to read from a distance of "40cm"

If far point of myopic person is 50 cm in front of the eye, what is the power of lens required to enable him to see very distant objects clearly ?

A nearsighted person has a far-point located 7.5 m from the eye : What would be the power, if a contact lens were used ?

The far point of a myopic person is 80 cm. In front of the eye. What is the power of the lens required to enable him to see very distant objects clearly ? In what way does the corrective lens help the person above?Does the lens magnify very distant objects?Explain.

The far point of a myopic person is 80 cm. In front of the eye. What is the power of the lens required to enable him to see very distant objects clearly ? The person above prefers to remove his spectacles,while reaing a book.Explain,why.

A person can see objects clearly, when they are farther than 12.5 m away What type of lens and what type of power will allow the person to see distant objects clearly ?

A certain nearsighted person cannot see objects clearly,when they are more than 78 cm from either eye. The person's near pint is 23 cm.How is this affected,when viewing through the corrective lenses?Assume that the lenses in spectales are 3 cm in front of the eye.

A person cannot see object beyond 1.5 m distinctly . What type of lens should be used to restore proper vision?