What will be the prescription of spectacles in a patient having simple hypermetropia with the rule astigmatism?: (A) -2D at 180o, (B) -0.5 at 90o, (C) +1D at 90o, (D) +3D at 180o
Answer is D. Patient has Hypermetropia, hence plus lens should be used.
With the rule astigmatism => Vertical meridian more curved than horizontal meridian.
Hence, +3D at 180o in used.