Inclusion Criteria:

• Students in grades 1 to 4 from participating primary schools.
• Children with premyopia or myopia at baseline, defined as cycloplegic spherical equivalent refraction in the worse eye greater than -0.50 D and less than or equal to +0.75 D for premyopia, or less than or equal to -0.50 D for myopia.
• Written informed consent provided by a parent or legal guardian, and age-appropriate assent obtained from the child when applicable.
• Willingness to participate in baseline and follow-up assessments during the study period.

Exclusion Criteria:

• Strabismus, amblyopia, or other ocular abnormalities.
• Systemic disease or other medical conditions that may affect study participation.
• Has received any myopia prevention intervention in the past 3 months.
• Known skin sensitivity, local ear skin lesions, or other conditions judged unsuitable for auricular acupressure.
• Any other condition judged by the study doctors to make participation inappropriate.