What is Myopia?
Myopia, or nearsightedness, as its name implies, is the condition in which the eye can SEE NEAR objects clearly but can't see FAR objects clearly.  Far objects, or distant objects appear blurred.
Near Sight = Near See = See Near
Nearsightedness should NOT be confused with blindness or temporary blindness, as many parents do.
Many parents do.
Many parents think that when their children become nearsighted, they are blind or temporary blind and they need to wear prescription glasses in order to SEE again.
As you will learn from this website, prescription glasses have side effects and will cause children's and even adults' nearsightedness to progress or get worse at an incredible rate.  Children should NEVER wear prescription glasses.  Nearsighted children are NOT blind.  Nearsighted children can see EVERYTHING clearly except for distant objects or far objects.  Nearsighted children can also see far objects, but very slightly blurred, which does no harm. And children spend most of their time on near objects, not far objects, which means they can see everything they need to see. 
With nearsightedness, the eyeball is too long to focus image from distant objects on the retina at the back of the eye.  The higher the nearsightedness, the longer the eyeball.
(Note: Emmetropic eye = Normal Eye)
A -3.00D myopic eye is about 1mm longer than normal eye.  Highly myopic eye has a risk of getting retinal detachment which leads to blindness.  A -6.00D myopic eye has a 1/20 chance of getting retinal detachment.
Warning:  Nearsightedness may lead to blindness
Save your children's eyes before it is too late.