Far points of myopic eye is `250 cm,` then the focal length of the lens to be used will be

The far point of a myopic eye is 100 cm. What is the focal length of the lens required to see very distant (normal far point) objects clearly?

The far point of a myopia eye is 60 cm. Find the focal length of the lens used to correct it.

The far point of a myopic eye is 10 cm from the eye. The focal length of a lens for reading at normal distance ( 25cm) is

The far point of a myopic eye is at 50 cm . Calculate the power of the lens to correct his vision.

Focal length of eye lens is changed by