I had glasses since I was 5 years.My vision was the worst. I had -7.25 vision. Then I tried Ortho-K. It helped my vision so much. At first it was hard and bothering because my vision was horrible, but in a week it was amazing. i could see perfectly. I was amazed how well it worked. I would definitely recommend Ortho-K to anyone who wants to see perfectly. Thank You So Much Dr. Friedman!