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?

The far point of a myopic person is 120 cm in front of the eye. Find the focal length and the power of the lens required to enable to see distant objects clearly.

A near point of hypermetropic person is 50 cm from the eye. What is the power of the lens required to enable the person to read clearly a book held at 25 cm from the eye?

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?

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?

Make a diagram to show how hypermetropia. is corrected. The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? Assume that the near point of the normal eye is 25 cm.

A person cannot see objects nearer than 1.2 m from his eyes. He wants for read a newspaper placed at a distance of 30 cm clearly. What is the nature and the power of lens required for this purpose?

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

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