STRENTH +2.50 Get 2 Pairs >>>Fashion and protection: These stylish frames have a classic retro look and are equipped with a bifocal lens for magnification correction. /// INVISIBLE: Designed so that the bifocal line is not visible when worn. Seamless and “invisible” transition from shade to reader. /// Lightweight and durable: These leaders and shades are lightweight, compact and made of premium materials that last a long time.