LLLT utilized the 650-nm red light to provide sufficient energy to stimulate the tissue without causing damage to the surrounding tissues. And several researchers reported the long-term efficacy of LLLT in slowing the progression of myopia to date. These studies were reported various illumination and irradiance. This study is to test the efficacy of LLLT comparing to the control group as well as to test whether two types (Circles versus Diffractive Optical Elements) of lighting design will be different to the efficacy and safety.
Low-lever red light therapy (LLLT) has been used to control myopia progression in China for a few years besides amblyopia therapy for a few decades. This study is to test the efficacy of PBM therapy to myopia children as well as to compare two types of PBM therapy to control myopia progression within one month.