Question

At the eye-doctor's office they find that your Far Point (FP) is 1.5 m. what is your condition and what is your prescription?

A) Myopia/ D=+3.33
B) Myopia / D=-0.67
C) Hyperopia/ D=+3.33
D) Hyperopia/ D=-0.67
E) other

Answer 1

The condition is myopia or nearsightedness, and the correct lens prescription to correct this condition is a diverging lens with a power of -0.67 diopters, so the answer is B) Myopia / D=-0.67.

Step-by-step explanation:

If the far point (FP) of the eye is 1.5 m, this means the person cannot clearly see objects beyond 1.5 meters without corrective lenses, which indicates the condition known as myopia or nearsightedness. To correct myopia, a diverging lens is required, which has a negative diopter (D) value. The lens formula 1/f = D, where f is the focal length in meters and D is the lens power in diopters, can be used to calculate the needed prescription.

Therefore, using the formula with the far point, f = 1.5 m, we have 1/f = 1/1.5 = 0.67 D. The prescription would be the negative of this value, so the correct answer is D = -0.67. Therefore, the correct option is B) Myopia / D=-0.67.