The lenses are made out of similar chemical substances as those used in the development of photographic film. While film exposure was created to be permanent, photochromic lenses are also made with copper chloride, which strips the silver of its chloride electron. This is what helps the lenses return to their original, non-absorbing state in…
Transition Lenses is an actual brand, and is probably the most popular brands within america. The reality is that even eye good care practitioners will often make reference to photochromic lenses as changeover lenses, and they are discussing the technology, not necessarily the brand. There are several other brands, plus they generally use the same…
Ultraviolet rays hasten cataracts and macular degeneration. They can also result in pingueculae and pterygia — unsightly yellowish or “bloodshot” growths at first glance of the eye that may block or distort vision. Light rays on the blue end of the light spectrum have shorter wavelengths and much more energy. In and of itself, blue…