Black Forever 591 Rx Eyeglasses - Shiny Black Frames-Black Crystals BK591 are a hip-shakin' style with rounded-square frames and black crystal-accented temples. Black Forever 591 Eyeglasses give you a modern retro style with Rx lenses made to your prescription specifications. Just fill in your prescription info, and these genuine Black Forever frames will ship to you direct from our eyewear labs with single-vision prescription lenses made to your exact specifications. The single-vision lenses installed in your Black Forever 591 Prescription Eyeglasses are designed for those who only need a single correction strength in each eye, and have one prescription strength across the entire lens. Black Forever 591 Rx Eyeglasses are hand-built in Japan, crafted with the finest acetate for a great fit and comfortable, lightweight wearing. When you need new glasses, go Black Forever - it never goes out of style.