Photochromics: Change for the better

Carl Zeiss Vision

PhotoFusion

Speed is one of the key features of Carl Zeiss’ PhotoFusion lenses. Depending on climate and light conditions and lens material, they are said to darken up to 20% faster than previous Zeiss photochromic lenses and importantly, fade back twice as fast. Darkening can take between 15 and 30 seconds, while fade back to 70% transmission can take a little as five minutes. In their clear state, transmission is rated at 92% and 11% for dark state.

PhotoFusion is available in two colours, brown and grey, in 1.5, 1.6 and 1.67 indices and on the manufacturer’s progressive, single vision, digital and DriveSafe lenses, meaning practitioners can offer their patients maximum flexibility in lens choice.