Things You Should Know About Photochromic Sunglasses

Photochromic sunglasses are a special kind of sunglasses that are made from photochromic lenses. When they are wore indoors, they are like clear glasses. And the lenses can darken automatically in response to sunlight outdoors. As a result, photochromic sunglasses are not only suitable for adults but also kids. Since kids spend a lot more time playing outdoors, it is quite necessary for them to wear photochromic sunglasses to block away the harmful UV rays. And the photochromic lens works well.

When you want to choose photochromic sunglasses, there is a wide variety of lens materials for you to choose, such as polycarbonate lenses, high-index lenses, or regular plastic or glass lenses. Each of them has unique qualities of its own and are suitable for different kind of people. Polycarbonate lens is typically suitable for kids because it is highly flexible and durable. The impact-resistance is ten times higher than other materials. This can help prevent many kinds of eye injuries. Most people like to choose photochromic sunglasses because they are quite convenient for both indoors and outdoors. And the quality of changing colors depending on the sun light is just wonderful for outdoor activities.

Nevertheless, it is not always the good side. There is also the bad sad. And for photochromic sunglasses, a limitation is that that don't darken adequately inside a vehicle for driving in sunny conditions. This is because photochromic lens needs the sun's available UV rays to activate the darkening process, but most car windshields simply block UV rays. For that reason, some lens manufacturers have introduced "sun" photochromic lenses that are designed for outdoor wear and typically daylight driving. These lenses have a mild tint and darken further when directly exposed to the sunlight. Firmoo always works the hardest to present you the most satisfied and cheap sunglasses, get online to check some photochromic sunglasses that you may like.