Introducing our high-quality {SETO 1.56 Semi-Finished Blue Block Single Vision Lens}. As a reputable factory, we prioritize customer satisfaction by producing top-notch lenses. These single vision lenses are expertly crafted with a 1.56 refractive index, ensuring optimal clarity and vision correction. Additionally, our lenses feature an innovative blue block coating, effectively filtering harmful blue light emitted from screens, reducing eye strain and promoting better sleep quality. Trust in our factory's commitment to excellence and invest in these lenses for improved visual comfort and protection.