Glasses Lenses - Eyeglasses Lenses

Now, it is really hot this summer, and our eye may get damaged under long time explore at the shining sunlight, eye diseases such as cataract, glaucoma and so on, which may be happened in a later life, are considered to have some connections with the harmful UV light by our experts! That’s the main reason why so many people need to prepare a pair of sunglasses when they are going outside for some business, if you are not lucky to get vision problem of myopia already, it is time to keep two pairs of glasses lenses during your outdoor activities! It is really a hassle situation! However, some guys may argue that we now can buy prescription sunglasses now, we can wear only one pair! That’s a bit reasonable, then, have your ever had the idea that are your still willing to wear colored glasses lenses when you are indoors? People will feel you are not so nice, especially when you are doing business with strangers!

Then, a good solution to this dilemma seems to be a lens can change color when you are in different situations, indoors and outdoors! That’s correct, we have photochromic glasses lenses now! Such lenses are Invented 35 years ago, approximately. They change their color by lighten or darken its level of tint automatically, and the degree they can the lenses can change color depends on the whole number of UV rays the eyeglasses are exposed to! Actually, there is a active ingredient in such glasses lenses that cause they change color, and the name is silver halide, which mixed throughout glasses lenses uniformly, so, the color can change averagely! They can benefit lots of people who don’t what to bring two pairs of eyeglasses with them on time and switch them at different situations!

Apparently, the amount of silver halide can affect the effect of the color changing, so, in one lens, the ingredient should be more in the thickest part than the edges! And what’s more, if you don’t have the same prescription of your two eyes, the degrees of tinting should also be differentiated in order to have a same color!

People who are suffered from light sensitivity can also get benefit by wearing photochromic glasses lenses, light passing through such lenses is becoming more moderate, and these patients feel a more natural color scene! Today, these eyeglasses are available in many manufacturers, the price is cheap, and the quality is usually satisfied!