Slow Myopia Progression With Different Irradiance Light

It is a prospective clinical control study on red light control myopia with specail design spectacles for 75 children in 3 groups. Study Groups with two different powers of 0.6 mW and 1.2 mW at wavelength of 650nm. The control group is to wear the same brand and design spectalces as those two study groups. In addition, the progression of myopia is usually accompanied by the changes in a variety of ocular parameters, such as refractive error, reduced submacular choroidal thickness, and prolonged length of the ocular axis length.The goal is to test which power (1.2mW and 0.6mW) is better in myopic children for 3 month's follow-up and also to test how to get better result with the increaing or decreasing lighting power for the total 6 month follow-up results .