Jim Halo Clip-On Sunnies are a combination of prescription glasses+sunglasses. They are designed for who wear prescription glasses and consider some options available for sun protection. Buying a pair of sunglasses prescription glasses is a solution. However, honestly, the design is not practical for sunglasses function or prescription function. And the price is not nice. Jim Halo Clip-On Sunnies are designed to allow you to easily attach over your prescription glasses by a magnetic clip on sunglasses. It gives you the flexibility to transform their existing pair of prescription eyeglasses into stylish sunglasses with ease.