BZ OPTICS PHO Frames with Photochromic Bifocal Lens.
» Lightweight flexible frame with dual moulded non slip temples.
» Adjustable non slip nose piece for comfort and fit, ideal for a wide range of face shapes and sizes.
» Comes with a hard case and microfiber cleaning cloth.
» Lenses change colour from Clear in Low Light to Dark Grey Cat3 in strong UV sunlight.
» These are ideal for anyone who normally needs reading glasses to be able to read digital screen such as bike GPS's, bike instruments, maps or just newspapers.
» Small lens clips make lens changing easy.