This was a very particular experienced happened in the last three years. The story started with a physical check for my daughter. She was told that she has got nearsighted at the age of eight. I felt really sad, because mypoia was hrad to treat at that time. The doctor told us that my duaghter must reduce the time of learning and played outside as much as possible. Only doing that could make her glasses prescriptionunder -6.00D after growing up. I didn't give up to help my daugher recover from myopia. I thought that myopia was just one kind of a diseases. It could definitely be treated well. So, I looked for methods online. Fortunately, I met a lot of people who had the same situation as me. We also met some great doctors who tried their best to help children recovery from myopia. They told us the two main reasons that caused were dark and geeting to close to books while studying and reading. So, two interesting things were invented. One uses the 650nm red light to keep children's choroid in a proper thickness which efficiently prevented eyeballs getting long on anteroposterior diameter. Meanwhile, children can use a special device that made up with several pieces of glasses. It can create virtual images of the books in front of you to a far distance. In that case, when you are studying, you are actually watching the books from usually three to eight meters. My daughter's glasses prescrition has been dropped from -2.00D to -0.5D. It's great amazing! I also appreciate Essilor who always offers good quality glasses for children all over the world. Nothing can be better than pictures. Maybe the pictures below can let you understand the devices well.