Myopia most commonly originates from the elongation of the eyeball. Excessive elongation of the eyeball increases the risks of permanent vision loss due to cataract, glaucoma and macular changes.

Traditional means of vision correction like glasses, contact lenses and refractive surgery, relieve the symptoms of blurry vision by only helping you to see better. However, these options do not slow or halt the excessive elongation of the eyeball. 

There are now options available to slow down/halt the abnormal eyeball elongation thereby slowing down the progression of myopia. By reducing the abnormal elongation, the risks of possible vision loss can be reduced.

In saying that, monitoring your child's myopia progression should rightfully be done with axial length (eyeball length) instead of just the glasses prescription.