The Serene lens is a design that has been calculated to reduce visual fatigue produced by a continuous accommodation effort.
After 20 minutes working at near distance, the eye muscles get tired which causes a variety of problems including blurry vision, pain, dry or red eyes and headaches.
AF Zone lenses increase the strength in the lower part of the lens. This extra power helps the eye muscles to focus the image, meaning less strain for the eye. During prolonged times focused on near activities, this ophthalmic lens makes a big difference compared to conventional single vision lenses, eliminating the uncomfortable effects of visual fatigue.