Photochromic materials have the property of variable light transmittance as a function of incident light intensity and wavelength. Over time, the responsiveness of such materials has been developed ...

Photochromic or transition lenses that darken outdoors are useful if you're sensitive to sunlight. They block 100 per cent of the sun's ultraviolet rays, so you don't need prescription sunglasses.

Imagine sunglasses that let you adjust their tint with a simple twist, inspired by photography technology. Lombell’s ...

Gradient-tinted direction: In a gradient-tinted or double gradient-tinted lens, the direction along which the variation in tint occurs. This is assumed to be vertical unless otherwise ordered.

I couldn’t wait to try some cycling glasses that met both needs. I wasn’t disappointed. I tested two pairs from BZ Optics: the PHO Bifocal Photochromic HD Lens model and the smaller ‘women/junior’ ...

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Isomerization of organic photochromic molecules involves chemical processes such as: pericyclic reactions, electron and intramolecular hydrogen transfers, cis-trans isomerization and photodimerization ...

Photochromic lenses are game-changing. Thanks to ocular wizardry beyond our feeble comprehension, photochromic lens tints adapt to varying light conditions. What does this mean? It means that one lens ...

A trusty tyre on wet and mucky country lanes: the high-density carcass, which incorporates Aramid fibres, does a great job at ...

If I have a problem with Tifosi’s new Moab sunglasses, it’s that they look too awesome on my face. When I first pulled out my ...