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photochromic

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Photochromic lens - Wikipedia
A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation . In the absence of activating light, the lenses return to their clear state. Photochromic lenses may be made of polycarbonate, or another plastic. en.wikipedia.org
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how do photochromics work? - Transitions Lenses
Photochromic lenses are eyeglass lenses where photochromic molecules on the lens react to light and change their structure, causing the lens to darken. www.transitions.com
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Understanding Photochromic Lenses: Why Aren't They Turning Dark?
Photochromic lenses are a remarkable innovation that automatically change from clear indoors to tinted outdoors. This light-reactive feature ... www.zennioptical.com
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photochromic
photochromic, a. and n. (fəʊtəʊˈkrəʊmɪk) [f. as next + -ic.] A. adj. Of, pertaining to, or displaying photochromism.1953 Jrnl. Chem. Physics XXI. 1619/2 In those compounds which exhibit both thermochromism and photochromism the thermochromic and the photochromic colors are in each case spectroscopic... Oxford English Dictionary
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PHOTOCHROMIC Definition & Meaning - Merriam-Webster
1. capable of changing color on exposure to radiant energy (such as light) photochromic glass 2. of, relating to, or utilizing the change of color shown by a ... www.merriam-webster.com
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Photochromic Sunglasses - Smith Optics
Photochromic sunglasses feature lenses that adapt to varying light conditions, offering enhanced visibility and comfort throughout the day. www.smithoptics.com
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Photochromic lens
Plastic photochromic lenses use organic photochromic molecules (for example oxazines and naphthopyrans) to achieve the reversible darkening effect. Photochromic lenses filter 100% UVA as well as UVB. wikipedia.org
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Photochromic & Transitions Lenses: What's the Difference? - Stoggles
Transitions are a class (or several classes) above regular photochromic lenses. They turn much darker and have a grey and neutral color to the lenses. stoggles.com
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Everything you need to know about 0-4 photochromic lenses - Julbo
Our photochromic lenses are treated with a range of different coatings to suit each sport. Whatever the weather (snow, fog, rain or bright sunshine), they ... www.julbo.com
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PhotoChromic Glasses Explained - Everything You Need to Know
Learn about photochromic glasses! Photochromic lenses change from clear indoors to dark like sunglasses when you step outside. www.youtube.com
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Photochromic - Edge Eyewear
These lenses transition when exposed to UV rays. At their lightest state, they allow 87% of light to pass through, but in their darkened state, the lenses only ... edgeeyewear.com
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Photochromism
Photochromic complexes A photochromic complex is a kind of chemical compound that has photoresponsive parts on its ligand. Photochromic coordination compounds Photochromic coordination complexes are relatively rare in comparison to the organic compounds listed above. wikipedia.org
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photochromism
photochromism (fəʊtəʊˈkrəʊmɪz(ə)m) [f. asphotochromy (c) + -ism.] The phenomenon whereby certain substances undergo a reversible change of colour or shade when illuminated with light of appropriate wavelength.1951 Physics Abstr. A. LIV. 204/2 (heading) Photochromism in the bianthrone series. 1953 [s... Oxford English Dictionary
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Cycling glasses life span I've had my Tifosi sport glasses with photochromic lenses for about 4 years. Lately, when I rode them in 10 am morning sun, my eyebrow and eye started to feel terrible pain, that passed once ...
The photochromic layer itself is activated by UV light but is also damaged by it. Generally, one can expect photochromic lenses to last 1-3 years depending on use.
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Diarylethene
This means that their isomerization in a solid matrix can take place much more quickly than with most other photochromic molecules. Therefore, many diarylethenes have photochromic behavior both in solution and in solid state. wikipedia.org
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