討論

莊怡群 Ann Yi-Chiun ChuangTaiwan Speaker Small-Optical-Zone Ortho-K in Myopia Control 小光心角膜塑型片於近視控制中的應用Orthokeratology (Ortho-K) represents the foundation of modern optical myopia control through the induction of peripheral myopic defocus. Subsequent optical interventions, including myopia-control spectacle and soft contact lenses, were developed based on the same principle. A newer advancement in this field is the small-optical-zone overnight Ortho-K design, exemplified by the myOK-pro lens. This approach preserves the advantages of conventional Ortho-K while enhancing myopia-control efficacy by reducing the central treatment zone to generate greater peripheral myopic defocus. Traditional Ortho-K tends to provide stronger control in higher prescriptions, whereas low-myopia patients often experience limited defocus and consequently weaker outcomes. For children who are unsuitable for or unwilling to wear spectacles or soft lenses, this presents a therapeutic gap. Small-optical-zone designs aim to address this need by improving defocus magnitude for low-myopia patients. However, simply reducing the optical zone in older designs may increase visual disturbances such as flare and halo. Modern small-optical-zone lenses seek to overcome these limitations, offering optimized visual quality alongside improved myopia-control performance.

蔡佳穎 Chia-Ying TsaiTaiwan Speaker