Introduction: This study analyzed the effectiveness of 650-nm red-light feeding instruments in the control of myopia. Methods: In this study, 164 school-aged participants diagnosed with myopia in the city of Shenzhen were enrolled in a red-light feeding instrument study. Of these, 41 were enrolled in the mild-to-moderate myopia group that received red-light feeding (RLMM group), 65 were enrolled in the mild-to-moderate myopia group that received single-vision spectacle treatment (SVSMM group), and 58 were included in the severe-myopia group that received red-light feeding (RLS group). Results: After the baseline values of the three groups were matched, the right-eye data were used for statistical analysis. The average return-visit time of each group was 60.42 days, and changes in the observation indexes before treatment and after follow-up treatment were compared. As the primary outcome, the axial length changes in the right eye of the SVSMM group (0.08 ± 0.40 mm), the RLMM group (–0.03 ± 0.11 mm), and the RLS group (−0.07 ± 0.11 mm) were compared and showed a statistical result of P

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