Repeated low-level red-light therapy lowers myopia onset risk in youngsters: Study

112 Chinese children aged 7 to 12 who had myopia of at least -0.50 D, astigmatism of less than -1.50 D, and anisometropia of less than 1.50 D all took part in this double-blind, randomized, controlled clinical experiment. The RLRL group or the sham device control group, with a three-minute session length each session, twice daily, and a minimum four-hour gap between sessions, was randomly allocated to participants in a 1:1 ratio. Red light treatment was delivered at home using a desktop device. The fake gadget was identical to the real one, except only had 10% of its power. Axial length (AL) and cycloplegic refraction were assessed at baseline and after six months. Generalized estimating equations (GEE) were used to compare changes in cycloplegic spherical equivalence refraction (SER) and AL between the two groups.

The key findings of this study were:

1. 111 kids in all were included for the analysis. In the RLRL group, the mean SER change after 6 months was 0.060.30 D, while in the sham device control group, it was -0.110.33 D.

2. The mean increases in AL were 0.020.11 mm and 0.130.10 mm, respectively. Children in the RLRL group exhibited reduced axial elongation and myopia progression in the multivariate GEE models than children in the sham device control group.

In conclusion, the PI suggested that the RLRL therapy was well tolerated by the youngsters and it had no unfavorable side effects.

Reference: 

Dong, J., Zhu, Z., Xu, H., & He, M. (2022). Myopia Control Effect of Repeated Low-Level Red-Light Therapy in Chinese Children: A Randomized, Double-Blind, Controlled Clinical Trial. In Ophthalmology. Elsevier BV. https://doi.org/10.1016/j.ophtha.2022.08.024