BZ Optics PHO Photochromic Bifocal Mountaineering This lens provides outstanding protection

This lens provides outstanding protection in the mountains from valley to summit

Just wipe your lenses as usual

Light Conditions: Medium Light

Not suitable for Progressive PD under 33

BZ Optics PHO Photochromic Bifocal Mountaineering This lens provides outstanding protectionBZ OPTICS PHO Frames with Photochromic Bifocal Lens. Features. 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. Lenses change colour from Clear in Low Light to Grey Cat2 in strong UV sunlight. These are ideal for anyone who normally needs reading glasses to be able to read