The RX Optical Insert for Lynx is specifically designed for use with Lynx sunglasses, providing a custom unglazed RX insert that seamlessly integrates behind the sunglasses lens. This insert offers a practical solution for those who require prescription lenses while still wanting to enjoy the benefits of wearing sunglasses. With its easy clip-in design, the insert ensures a secure fit and optimal functionality, allowing users to experience clear vision and protection from the sun's harmful rays without compromising on style or comfort.