Clinical Study on the Effectiveness of Diverse Segments Defocus Optimization in Spectacle Lenses for Slowing Myopia Progression

Inclusion Criteria

• •Age 6-14 years
• •Myopic spherical equivalent refraction between -0.75D and -4.00D (inclusive of -0.75D and -4.00D, based on cycloplegic refraction)
• •Astigmatism ≤1.50D
• •Anisometropia ≤1.50D
• •Best-corrected visual acuity (BCVA) reaching 5.0 (0.00 LogMAR) or better in both eyes; monocular BCVA reaching 5.0 (0.00 LogMAR) or better after wearing myopic defocus spectacles
• •Absence of organic ocular diseases
• •No history of myopia control treatment within the past three months, including orthokeratology, progressive multifocal lenses, peripheral defocus spectacle lenses, bifocal spectacle lenses, defocus-designed soft hydrophilic contact lenses, other myopia control medications, or light-therapy devices
• •Voluntary participation in this clinical study and provision of signed informed consent