When the iconic eyewear brand Ray-Ban® added green tinted flash lenses to its 58mm gold metal Aviators, history was made. Soon, everyone—and not just selfie lovers—wanted a pair of the modern mirror sunglasses that not only blocked out harmful rays, but gave them a unique look while doing it.

Flash lenses are made by applying a mirror coating application to sunglasses’ lenses through an advanced technological process where superheated metal oxides are fused to the lens at molecular level to ensure a uniform layer. This reduces the reflected light that enters your eyes while you wear your favorite pair. Flash lenses are perfect for those who are light sensitive, such as those who have green or blue eyes.

From the Aviators, the brand continued to add a flash lens version to its other well-loved sunglasses lines such as the Clubmaster, Wayfarer, Rounds and Double Bridge. The huge success of Ray-Ban® Flash Lens Aviators has inspired many other eyewear brands, but nothing comes close to the original.

So are flash lens sunglasses just a fad? They are perfect for outdoor use because they reduce the glare from snow, water and other shiny surfaces. They improve vision and protect your eyes. They come in a variety of colors and styles, from gradient to full lenses, upping the style ante when it comes to your look. With all this in mind, it looks like flash lens sunglasses are here to stay and are now considered a classic addition that belongs to your eyewear wardrobe.