The children's short sight have become an all-prevading problem in society. Most parents will let children wear myopic optical. In fact, adolescent still be in plant, Their axial length is also in the growth phrase. If they wear myopic optical eyeglasses, it may influence the growth and development of optic axis. And it may have adverse effect: accelerating the growth of myopic strength.

Progressive lens can solve this problem, Because porgressive lens have three strengths. Which are used to see far ,middle ,near three distance respectively . But the ordinary lenses only have one strength. children need different strengths when they watch in the different distance, The child who wears nomal lens or optical glasses can ony coordinate with their own eyes. Progressive lenses have three different diopters which may help children adjust. It can somewhat control kids' myopia.