A farsighted person has a near point of 55 cm rather than the normal 25 cm . Part A What strength lens, in diopters, should be prescribed to correct this vision problem

We have do = 25cm and di = -55cm

So 1/f = 1/do + 1/di = 1/25 + 1/(-55) = 2.214x10^-2

So f = 1/2.214x10^-2 = 45.2cm

So power = 1/0.452m = +2.21 Diopters (converging lens)

i = 2 / - 5

step-by-step explanation:

evaluation of ( 2 - 4 ) ( p + q ) when p = 2 and q = 5 i, by putting values of p and q,