In myopia there is
Increased length of eyeball
Decreased length of eyeball
Decreased refractive power of cornea
Lens is dislocated posteriorly
(A) Increased length of eyeball > Myopia ("nearsightedness" (AmE), "shortsightedness" (BrE)) is a refractive defect of the eye in which collimated light produces image focus in front of the retina under conditions of accommodation.> Axial myopia is attributed to an increase in the eye's axial length.
Special Senses: Vision and its Elements