Most studies have shown that a Myopia Management program can reduce the level of myopia at age 20 by 50-60%. Experienced practitioners usually find that they can reduce it by 70-80%. 

For example, a child without treatment could be at -10.00 by age 20. However, it would be anticipated that with treatment the child may only be a -2.00 to a -4.00 by age 20. 

While this does make life better from a vision standpoint, the real benefit to doing this is that the lifetime risk for sight threatening vision conditions like retinal detachment, glaucoma and degenerative myopia is dramatically reduced.