Vistana sunglasses are the world's most luxurious OveRx (over prescription eyewear) sunglasses, presenting a radical departure from traditional OveRx designs. Vistana S sunglasses are a part of the Vistana collection, the world's only OveRx sunglasses featuring Dynamic Base Technology (DBT). Without sacrificing optical performance, the polarized lenses in wrap-shaped frame offer a panoramic view. This unique technology eliminates the need for the side shield normally associated with conventional OveRx sunglasses. Unlike regular "fit-over" sunglasses, its almost impossible to indentify Vistana sunglasses as an OveRx sunglass.