Shoening of 2 mm of axial lengsth of eye ball causes -: (A) 3D myopia, (B) 6D myopia, (C) 3D hypermetropia, (D) 6D hypermetropia
Answer is D. 1 mm change in axial length leads to ametropia of 3d. For example 1 mm shoenign an axial length causes hypermetropia of 3D. Reference :Khurana 7th edition,page28