[Chinese expert consensus on the efficacy evaluation and fitting of defocus multi-segment spectacle lenses designed for myopia control (2025)].

With the emergence of various multi-segment myopic defocus design spectacles, evaluating and verifying their myopia control effectiveness and controlling their quality and wearing safety have gradually attracted widespread attention. At present, myopia prevention and control spectacles have not been classified as medical devices directly supervised by relevant national departments in China. Multi-segment myopic defocus design spectacles, as an important intervention for retarding the progression of myopia, especially for children and adolescents, should ensure the myopia control effectiveness, safety, and adherence to standardized fitting protocols. Aiming to provide guidance and reference for healthcare institutions and practitioners, the Society of Contact Lens Safety Monitoring & Vision Health of Chinese Health Association and the Western Optometry Expert Committee of Sichuan Optometry Society, based on the current evidence-based medical research, combined with practical experience and extensive solicitation of opinions, have reached consensus opinions on the quality control, effectiveness evaluation (including long-term effectiveness), and safety evaluation of multi-segment myopic defocus design spectacles, as well as the service norms for the fitting of spectacles.