Photochromic lens, is a light-sensitive eyeglass lens that automatically darkens in sunlight and clears in reduced light.
If you’re considering photochromic lenses, especially for preparation of summer season, here are several things help you to know about photochromic lenses, how do they work, how you benefit from them and how to find the best ones for you.
How photochromic lenses work
The molecules responsible for causing photochromic lenses to darken are activated by the sun's ultraviolet radiation. Once exposed, the molecules in photochromic lenses change structure and move, working to darken, absorb the light and protect your eyes from the sun's damaging rays.
Besides of monomer photochromic, a new technology of spin-coating enables that photochromic eyeglass lenses are availble in nearly all lens materials and designs, including high-index lenses, bifocal and progressive lenses.
This photochromic coating is made up of trillions of tiny molecules of silver halide and chloride, which react to the ultraviolet (UV) radiation in sunlight.
Benefits of photochromic lenses
Because a person’s lifetime exposure to sunlight and UV radiation has been associated with cataracts later in life, it’s a good idea to consider photochromic lenses for children’s eyewear as well as for eyeglasses for adults.
Though photochromic lenses cost more than clear eyeglass lenses, they offer the convenience of reducing the need to carry a pair of prescription sunglasses with you everywhere you go.
An added benefit of photochromic lenses is that they shield your eyes from 100 percent of the sun's harmful UVA and UVB rays.
Which photochromic lenses are right for you?
A number of brands offer photochromic lenses for glasses. How can you get the best one for your needs? Start by thinking about your everyday activities and lifestyle.
If you’re outdoorsy, you might consider photochromic glasses with more durable frames and impact-resistant lens materials such as polycarbonate or Ultravex, which are the safest lens material for kids, providing up to 10 times the impact resistance than other lens materials.
If you’re most concerned about having extra protection as you need to work at a computer all day, you might consider photochromic lens plus blue light filter function. Even the lens will not go dark indoor, you can still get best protection from high-energy blue lights when you look at a screen.
When you need to drive in the morning or travel in gloomy weather, you might consider Brown photochromic lens. That’s because it filters out all other colors so well that you can see clearly and find the right direction.
If you are interested in more knowledge on photochromic lens, pls refer to https://www.universeoptical.com/photo-chromic/