the molecular sparse distribution

Sunglasses are designed glasses, to protect the eyes from ultraviolet ray. It is colored in dark color from bright sunlight. There are a variety of lenses, including non-ferrous, polarization, color photography and mirror. Colored lenses with different colors. Different lens color can absorb different types of lights. Polarized lenses can refract light level. Polarized sunglasses of polarizing filters by using chemical film. The surface chemical film glass or plastic is often used. The chemical compound function is to make the molecules aligned parallel with light source. When the chemical membrane applied in the lens, micro filter will be created. Micro filter is aligned with the corresponding capable of absorbing molecules matching light.
When exposed to ultraviolet ray, photochromic lenses can become black. When you are in the indoor environment, the lens will return to its original state. The camera, to return to the original state, obviously, just like an ordinary lens. Than polarized lenses, photochromic lenses are more expensive.
Cover the mirror lens with reflection coating. Reflective coating is so thin, who refers to it as 1.5 silver surface. It was given the nickname, surface silvered, because this is the reflection in the lens of the molecular sparse distribution. As a result, into the mirror of opaque glass used for molecular only half the amount of.
If you want to save money, at the time of purchase, suggest you are shopping online store. The online store has a large range of sunglasses for your choice. You will be able to shop for all online shops, including men, women and children's sunglasses sunglasses. Some online stores classification sunglasses, with different price range. In this way, you will be able to browse the sunglasses on your budget. You can get a pair of sunglasses for $10 cheaper. If you want to brand sunglasses, you must pay more money. You should get a prescription, and then to buy sunglasses. Prescription from local optometrist store.