2012年7月3日星期二

An overview of photochromic sunglasses

What are photochromic sunglasses?

Photochromic sunglasses are eyewear with photochromic lenses that can change from transparent to dark tint. When exposed to UV rays, photochromic lenses become darken. With the absence of UV rays, photochromic lenses become clear. In the simple words, photochromic sunglasses darken when outdoors and lighten when indoors. Due to their special features, they are much favored by an increasing number of glasses wearers who want to have a try at prescription sunglasses without having to buy an extra pair of glasses. In additions, photochromic lenses can be used in single vision and bifocals. So for people who need bifocal glasses, they also have the chance to wear photochromic sunglasses.


UV protection

Photochromic sunglasses can protect wearers from harmful UV rays. Long time exposure to strong UV rays will damage our eyes, the skin, or cause worse problems such as cataracts, etc. for people who have vision problems, fighting against dangerous UV rays is of importance for their defective eyesight.


Benefits

As a combination of prescription sunglasses and prescription glasses, photochromic sunglasses give the wearers much convenience. You don’t have to switch between your rx glasses and prescription sunglasses. Only one pair of photochromic sunglasses can give you benefits that your rx glasses and prescription sunglasses give you.

Problem

There is one problem about photochromic sunglasses you should pay attention to. There are circumstances under which the darkening will not occur. For example, it is proper to wear photochromic sunglasses in your car for photochromic lenses will not darken because the windows block the UV rays.

Hey guys, have you ever tried photochromic sunglasses. Since summer is already here, are you looking for prescription sunglasses? If so, you can get your hands on photochromic sunglasses that can be used as prescription glasses and prescription sunglasses. What a great item!



Please refer to this link for common questions about prescription sports glasses:
http://www.firmoo.com/answer/question/3058.html

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