Question

if D is distance of point of myopic eye then what then what is the focal length of concave lens required to rectify the defect ?​

Answer 1

Answer:

The far point for this eye is at infinity (effectively anywhere beyond ~ 5 m). Nearsighted (myopic) eye: The image point of an object point at infinity is formed in front of the retina. The far point of this eye is closer than infinity; the eye cannot form a clear image of any object point beyond this far point.