To explore the effectiveness of using repeated low-level red-light therapy to slow myopia progression.

Inclusion Criteria:

1. Age at enrolment: 6-12 years;
2. At least one eye with spherical equivalent refractions (SERs): -1.00 to -5.00 diopters (D), and stigmatism of 1.50 D or less;
3. Anisometropia of 1.5 D or less;
4. The BCVA of distant vision is at least 0.8;
5. Myopia progressed more than 0.5D in the past year;
6. Have normal thinking and language communication skills, and be able to actively cooperate with the treatment as required;
7. Written informed consent of guardian and child.

Exclusion Criteria:

1. Strabismus, amblyopia or other ocular abnormalities;
2. Other systemic abnormalities;
3. Prior treatment of myopia control in 6 months, e.g. drugs, orthokeratology, progressive addition lenses, bifocal lenses, etc in either eye;
4. Atropine allergy;
5. Other situations that not suitable for participating in the trial as judged by the researcher.