The PHO Range.
BZ Optics were the first company in the world to develop bi focal photochromic sunglasses, featuring high impact UV activated photochromic lenses which transition from clear (Cat0) in low or no light to grey (Cat2) in full sun. The bi focal magnification which is moulded discretely into the rear of the lens is available in +1.50, +2.00 and +2.50 powers. PHO range is also available with non reader photochromic (clear to dark grey Cat0 to Cat3), high definition photochromic (copper to dark brown Cat1 to Cat3), blue or red mirror lenses (Cat3). New to the range is blue mirror (Cat3) with bi focal readers +1.50, +2.00 or +2.50 and high definition (light amber Cat1 to dark brown Cat3) photochromic lenses with bifocal readers +1.50, +2.00 or +2.50. The TR90 super light weight hybrid frame has dual moulded non slip flexible temples ideal for wearing under open or full face helmets. The adjustable non slip nose piece ensures optimum fit and comfort for all face shapes. All PHO lenses are interchangeable.