Trial of Myopia Prevention Using +3D Lenses

A Randomised, Controlled Trial of Prevention of Juvenile-Onset Myopia in Chinese Children

The purpose of this study is to assess whether a short-term imposed myopic defocus is effective in preventing the development and progression of juvenile-onset myopia in Chinese children.

1. To determine if +3D lenses wearing for half an hour everyday prevents the development and progression of myopia in school children.
2. To identify ocular parameters and risk factors at baseline associated with development and progression of myopia.

Inclusion Criteria:

• All children in the selected class are enrolled

Exclusion Criteria:

• Hyperopia > +2.0 D
• High myopia > -6.0 D
• Astigmatism> 1.5 D
• Anisometropia > 1.5 D
• Strabismus and amblyopia
• Any ocular, systemic, or neurodevelopmental conditions that could influence refractive development
• Chronic medication use that might affect myopia progression or visual acuity
• Already receiving other treatment for progressing myopia