A person needs a lens of power -5.5 dioptres for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 dioptre. What is the focal length of the lens required for correcting
near vision?

A person needs a lens of power -5.5 dioptres for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 dioptre. What is the focal length of the lens required for correcting distant vision?

A miopic person uses a lens of power -1.25D. What is his farpoint?

A doctor has prescribed a corrective lens of power +1.5 D . Find the focal length of the lens . Is the prescribed lens diverging or converging?

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?

A person having a myopic eye uses a concave lens of focal length 20 cm. What is the power of the lens?

A person with a myopic eye is not able to see objects beyond 1.25 m from it. What is the nature, the focal length and power of the lens used to correct the' defect?

A person cannot see objects nearer than 1.5 m from his eyes while a person with normal vision can see objects upto 25 cm from his eyes. What is the nature and power of the, lens required to correct this defect?