| Ordinary glasses are easy to get scratched, which | | | | anything, but that it has an ability to restore to its |
| constitutes a trouble for most eyeglass wearers, | | | | original shape after heated to certain centigrade. |
| because they have to change new glasses | | | | As a result memory metal glasses are hardly to |
| between whiles. Therefore, when asked whether | | | | get broken. Like springs, they could be stretched |
| they are in want of a pair of durable glasses, their | | | | and zipped many times. |
| answers must be yes. However, as for the | | | | The above two types of durable glasses are |
| durability of glasses, a few people know much | | | | relative to the frame materials. As a matter of |
| about it. Today we'd like to introduce some | | | | fact the lens materials play an important role in |
| information concerning eyeglasses which are | | | | the durability of eyeglasses. Then what kind of |
| rather durable. | | | | lenses are of good breakage-proof ability? |
| Titanium is featured with corrosion resistance, | | | | Most people have a misconception that coated |
| similar to that of platinum, excellent | | | | lenses bear a good ability to stand wear and tear, |
| mechanicalness, and lightness, 48% lighter than | | | | however, the fact is that whether a lens is |
| ordinary metals, etc.. Titanium glasses are thought | | | | coated is related to the light transmission. Lenses |
| to be the ones of the best performances among | | | | that are hard coated are thought to be related to |
| all types of eyeglasses, then it is obvious that | | | | their abilities to stand wear and tear. Usually resin |
| they could work longer. However, due to the high | | | | lenses can easily get hard coated. |
| cost of titanium, titanium glasses ask for high | | | | Therefore, with the above knowledge, one would |
| prices. Common people are hardly able to afford. | | | | find it more easily when he/she wants to |
| Therefore, to meet the mass needs, titanium | | | | purchase a pair of durable glasses. At last, it is |
| alloy glasses are developed. Although mixed with | | | | necessary to remind the customers that when |
| magnesium or nickel, titanium alloy glasses bear | | | | choosing titanium glasses, they should pay more |
| similar features with titanium ones, but the former | | | | attention, for there has emerged a lot of pirated |
| are a little bit heavier than the latter ones. | | | | titanium glasses, which not only perform |
| Memory metal glasses constitute another kind of | | | | completely different from titanium glasses, but |
| durable glasses. The so called memory metal does | | | | also may bring you extra problems, like getting |
| not indicate that it has an ability to remember | | | | rust and causing skin allergies. |