The correction for a hyperopic eye with power 58.00 D to reach 60 D uses what sign in diopter notation?

• A. Negative
• B. Positive
• C. Zero
• D. Mixed

Answer: (B)

The key idea is that the sign in diopter notation shows whether the lens adds converging or diverging power. For hyperopia, you need a converging lens to move the focal point forward onto the retina. If the eye’s current refractive power is 58.00 D and you want to reach 60.00 D, you must add +2.00 D of correction. That added power is positive because it converges light. Negative would indicate a diverging lens (used for myopia), zero would mean no correction, and mixed isn’t a standard way to express this. So the sign used is positive.