Sports Single Vision Lenses

Certain fashion sunglasses or sports eyewear frames are designed for aesthetic and/or aerodynamic purposes, highly curved to wrap around the face. This results in the convex surface of the lens required being tilted and not perpendicular to the vertical view, unlike conventional frame designs, and therefore new lens design principles apply in order to avoid distortion, caused by both SPH-CYL error and prismatic error, particularly evident around outside of the lens center. Also, in case of high minus powers, lenses may be too flat to fit into curved frames. Excelite Sports SV was conceived especially for strongly curved frames. Sports Single Vision Lens is designed by compensating for SPH-CYL and prismatic error. With FFA (Face Form Angle) measurement and Sports Tech software calculations, the lens produced is accurate to the prescription required with a curved frame, which would be distorted with a conventional lens design in the same frame. Vision is more comfortable, clear and natural, even in fashion sunglasses or highly curved sports eyewear.