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 ...

We tested 16 of the best ski goggles to compare their fit, visibility, comfort and more. Only three pairs stood out as the ...

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.

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’ ...

The Aqua Sphere Kayenne Goggles with Photochromatic Lens are ideal to wear in a variety of outdoor environments as they adapt to different light levels from cloudy to bright light. They have an ...

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

induced by the absorption of electromagnetic radiation, which results in color changes. Isomerization of organic photochromic molecules involves chemical processes such as: pericyclic ...

Whether you’re hitting the slopes on a bluebird day or navigating through a snowstorm, having the right ski goggles is essential for comfort and performance. H ...

induced by the absorption of electromagnetic radiation, which results in color changes. Isomerization of organic photochromic molecules involves chemical processes such as: pericyclic ...