The most common cause of myopia is –: (A) A–P diameter is increased, (B) The thickness of lens is increased, (C) The viscosity of aqueous humour is increased, (D) The viscosity of vitreous humour is increased
Answer is A. A most common type of myopia and hypermetropia are axial, i.e. in myopia axial length of eyeball increases and in hypermetropia, it decreases.