Minimum Power and Frequency of Repeated Low-level Red-light to Effectively Control Myopia Progression

In addition to single vision spectacle lenses (SVS) with power for correcting distance refraction, the subjects used the prescribed power low-intensity red light treatment instrument for the prescribed number of treatments from Monday to Friday, with a 3-minute interval of 4 hours.

In addition to SVS with power for correcting distance refraction, red LED will be performed twice per school day with an interval of at least 4 hours, each treatment last 3 minutes.