SETO 1.56 Photochromic Flat top bifocal Lens HMC/SHMC is a premium quality product manufactured and designed by our factory. These lenses have a photochromic feature that helps in adapting to different lighting conditions, making them an ideal option for daily wear. The flat top bifocal design makes them perfect for people who need to use different prescriptions in one lens. The HMC/SHMC coating ensures that the lenses are scratch-resistant, anti-reflective, and provide clear vision. With our factory's expertise and stringent quality control processes, you can be assured that these lenses are of exceptional quality and will last a long time.