- Easily convert your sunglasses, cycling, or safety glasses into bifocal glasses with these reusable adhesive lenses. - They allow you to clearly see nearby objects through the bifocal area, while maintaining distance vision in the rest of the lens. - No water is required for application and they can be removed and repositioned without leaving any residue. - Compatible with a wide variety of glasses: sunglasses, cycling, skiing, blue light filter, among others. - Perfect for sports activities, driving, laboratory work, fishing, swimming, diving, and skiing. - Medium size (M), clear color, discreet and adaptable design. - It is recommended to press with a cleaning cloth to avoid fingerprints and ensure optimal adhesion.