Web Results

Photochromic lens


Photochromic lenses are optical lenses that darken on exposure to specific types of light of sufficient intensity, most commonly ultraviolet (UV) radiation. In the ...

How do Transitions® photochromic lenses work? - Explain that Stuff


Feb 27, 2016 ... Photochromic eyeglasses with one lens darker than the other .... the lenses can darken so much that they make driving dangerous in really cold ...

www.ask.com/youtube?q=Making of Transition Lenses&v=clOX6JtKmXs
Jan 22, 2014 ... Transition lenses will change into transition lens sunglasses once you go out in the sun but will always remain clear when inside. Learn about ...
www.ask.com/youtube?q=Making of Transition Lenses&v=pnsVks0SshA
Mar 17, 2013 ... A science project on the chemical equilibrium in transitions lenses ... I'll also be posting another video as soon as I make a few more stop ...
www.ask.com/youtube?q=Making of Transition Lenses&v=vHzrpHuHu4g
Sep 20, 2009 ... I got my glasses on September 12, 2009. I was making a video to see how long it took to transition from clear to dark and from dark to clear.

Photochromic Lenses: Transitions and Other Light-Adaptive Lenses


Dr. Gary Heiting outlines a buyer's guide to photochromic lenses (including ... to a lens to enhance contrast, especially in overcast conditions, making it a popular ...

Self-Darkening Eyeglasses | April 6, 2009 Issue - Vol. 87 Issue 15 ...


Apr 6, 2009 ... Glass photochromic lenses contain silver halide crystals embedded in ... products employ a similar strategy for making photochromic dyes, but ...

How Do Transition Lenses Work? | Mental Floss


Feb 26, 2016 ... If you're thinking about getting transition lenses, consider this: Every ... making it difficult for lenses to activate the darkening effect needed for ...

Do Transition Lenses Wear Out? | Transitions Lenses


Nov 7, 2013 ... Transition lenses generally last the life of a pair of glasses (or longer), ... Other factors can make you think they're worn out, when they aren't:.

Transition Brown vs Grey | Transition Lenses


Oct 7, 2013 ... Transition gray lenses are slightly darker than transition brown lenses, making them best for those looking for the darkest possible transition ...

More Info

Photochromic Technology | Photochromic Lenses | Transitions Optical


Our photochromic Transitions lenses react to light and offer UV protection. ... PHOTOCHROMIC MOLECULES MAKE LIGHT, DARK, AND EVERY SHADE IN ...

Should I get Transition lenses? - Straight Dope Message Board


Also, remember that photochromic lenses respond to UV light, .... is a little bit of glare on the inside of the lenses, making it a little hard to see.

How Do Photochromic Eyeglass Lenses Work? - The New York Times


Feb 23, 2009 ... Car windshields block a significant part of the UV radiation, so your photochromic lenses will not darken enough to make driving comfortable on ...