In retinoscopy for refractive error at 1m, we add 1D ; if done at a distance of 66 cm, the additional factor will be –: (A) –2, (B) –1.5, (C) –0.5, (D) –5
Answer is B. Deduction of 1D for lm and 1.5D when retinoscopy is performed at 2/3rd m (67 cm) distance.