Question

QUESTION: A person has a near point of NP = 95 cm and a far point of FP = 155 cm. The person wishes to obtain a pair of bifocal eyeglasses to correct these vision problems. The glasses will sit a distance d = 1.6 cm from the eyes.

A)Write a formula for the power, P₁, of the upper portion of the bifocals, in terms of the given quantities, that will enable the person to see distant objects clearly.

P1=________

B) Calculate the power, P₁, of the upper portion of the bifocals in units of diopters.

C) Write a formula for the power, P₂, of the lower portion of the bifocals, in terms of given quantities, so that the person can clearly see objects that are located a distance N from his eyes.

P2=________

D) Calculate the power, P₂, of the lower portion of the bifocals in units of diopters. Use N = 25 cm, which is for normal human vision.

Please help me with parts A, B, C and D. Thank you!

Answer 1