Sunglass is an eyewear that is designed to protect the eyes from the ultra violet ray. It is tinted in dark color to block away the bright sunlight. There are a wide variety of sunglasses lenses including tinted, polarized, photochromatic, and mirror. Tinted lenses are dyed into different colors. Different lenses’ colors are able to absorb different types of lights. Polarized lens can refract away the light that is shine towards it horizontally. The polarized filter of the polarized sunglasses consists of a chemical film. The chemical film is often applied on a glass or plastic surface. The function of the chemical compound is to cause the molecules to align with the light source in parallel. When the chemical film is applied on the lens, a microscopic filter will be created. The microscopic filter is able to absorb the light that match with the alignment of the arrangement of the molecules.
The photochromatic lens can become darkened when exposed to the ultra violet ray. When you are in the indoor environment, the lens will return to the original state. When the lens is returned to the original state, it is clear just like an ordinary lens. Photochromatic lens is more expensive than the polarized lens.
The mirror lens is covered with a reflective coating. The reflective coating is so thin that people refer it as a half silvered surface. It is given the nickname, half silvered surface, because the reflective molecules which are on the lens are distributed sparsely. As a result, only half the amounts of the molecules are used to transform the glass into an opaque mirror.
If you want to save money in your purchase, it is recommended that you shop at the online store. The online store has a large range of sunglasses for you to choose from. You will be able to shop all kinds of sunglasses at the online store including men, women, and kids’ sunglasses. Some online stores will categorize the sunglasses to different price ranges. In this way, you will be able to browse the sunglasses based on your budget. You can get a pair of sunglasses for as cheap as $10. If you want branded sunglasses, you have to pay more money. You should get a prescription before proceeding to buy the sunglasses. The prescription can be obtained from the local optometrist store.
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