The most common cause of myopia is -
Axial type of simple myopia may signify just a physiological variation in the length of the eyeball or it may be associated with precocious neurological growth during childhood. other causes are : Curvatural type Role of diet Role of genetics Theory of excessive near work Reference : A K KHURANA OPHTALMOLOGY,Edition 4, Page-33
A-P diameter is increased
The thickness of lens is increased
The viscosity of squous humour is increased
The viscisity of vitous humour is increased
Optics and refraction