Prescription sunglasses can also be called corrective sunglasses, which have the eyesight corrective function of the myopia, hyperopia and presbyopia when compared to the traditional sunglasses. The fact is many of people are running into some kind of eye problems more or less. So the prescription sunglasses are strongly desired by the market.
Prescription sunglasses can be categorized into two types when considering the fabrication technique of lenses, including the lenses with tints and lenses with photochromic tints.
Lenses with tints remain constant all the times. Any color in the rainbow can the added to lenses as you like, gray, green, blue, and so on. Usually the dark colors are better to block the harmful rays and the light colors are used to add your fashion, so if you are most of the time being exposed to strong lights like in the altiplano or by the sea, you are recommended to wear the sunglasses with dark colors. Besides, some kind of color may have its special function. For example, the lenses with yellow color are the best choice for shooters because the so-called “blue-light blocker” decreases the haze and make the target object clearer. The most widely used colors in sunglasses are the gray, brown, and green because they function well in the common UV rays prevention.
Lenses with photochromic tints can automatically become darken outdoors and stay the same indoors, which is depending on the amount of ultraviolet lights they are exposed to. However, different companies may fabricate this kind of lenses in different ways, among all of which the transition lenses may be one of the best. The transition lenses are suitable for both the non-prescription and the prescription sunglasses, because the colors are changed evenly of all the parts of the lenses, regardless of how high-index your lenses are. They also provide a rapid changing between the dark and light wnviroment. Except for the common wearing application, the sunglasses with photochromic red tints can be used in the medical field to help the doctors to cure the patients with ocular pathologies, thus to enhance their vision.
Both of the lenses with tints and with photochromic tints are available in different lens materials. While not every lens is suitable for everyone, for instance, the lenses with photochromic tints are not fit for the drivers because the glass in front of the car will block many UV rays and the sunglasses with photochromic tints are not able to receive enough UV rays. Therefore, it is actually not dark inside the car.
In a word, if you decide to choose your prescription sunglasses, the key point is you choose the most light-weighted, comfortable and suitable lenses, protecting your eyes as well as enhancing your charm.