What are CR-39 Sunglasses Lenses and Why You Need Them

What are CR-39 Sunglasses Lenses and Why You Need Them

Shopping for sunglasses can mean different things to different people. On one hand, you may be the type of person who is looking for fashion and trendy lenses. An inexpensive, plastic pair of lenses that will only be worn a few times might fit the bill in this situation. On the other hand, there may be someone who is searching for all the bells and whistles for their lenses - polarized with UVA/UVB protection to protect from the sun. Then, there are a lot of people in between these two extremes who would like a little bit of both. At Nessy Khem, we prefer to use high grade CR-39 lenses. Here is everything you should know about these types of lenses.

What are CR-39 Lenses?

CR-39 lenses is an abbreviation for "Columbia Resin #39.” Developed in 1940, this resin revolutionized the sunglasses industry due to the fact that it mimics the quality of glass, without the downside. Lighter than glass, but far less likely to shatter, CR-39 lenses truly offer the best of both worlds. Furthermore, for anyone who has worn CR-39 sunglass lenses before, they will know that the optical quality of these lenses are just as clear as glass, meaning that you won’t have blurry vision or difficulty seeing when you wear these frames.


For a classic black frame with these beautiful lenses, try our Dennis frame Smokey Black that looks great on both men and women.

Why Not Use Glass?

As it turns out, glass would be the most superior lens material when it comes to optical quality. However, true glass lenses have a lot of downsides when it comes to choosing the best material for your sunglasses. For one, glass lenses break incredibly easily so they can be a safety hazard for anyone wearing them. Have you ever heard of the saying “coke bottle glasses”? This term refers to incredibly thick lenses, which is what you get when you use real glass. CR-39 lenses have the same visibility/clarity as real glass, but they are much more difficult to break and are also incredibly slim. This means that they are an excellent choice instead of glass.


These Cappucin frames in yellow showcase a special sunglasses frame style but with the versatile, slim lenses. The gray color means enhanced visibility so you won’t miss a moment wearing these beautiful frames.


What About Eye Protection?

All of Nessy Khem’s sunglasses use CR-39 lenses that also offer 100% UVA/UVB protection from the sun. This means that your eyes will be protected from harmful UV radiation that comes from the sun that can result in health problems down the road. So, you can rest assured when you wear a pair of Nessy Khem sunglasses that you will not only look fabulous, but the CR-39 lenses are also protecting your eyes and the delicate skin around them.


Our Jannah frames in white are an example of a truly special frame featuring these lenses. The intricate details on the side complement these special lenses with further anti-glare (AG) or anti-reflective (AR) lens coatings.


Other Benefits

Other benefits of choosing sunglasses with CR-39 lenses include the fact that they are more cost effective than other polycarbonate options. CR-39 lenses are also better at taking in light, which is important to maintaining good eye health.


When it comes to sunglasses, all parts are important, but it is the lenses that hold the key to your eye health, vision, and overall positive experience wearing the frames.  We have selected the highest quality CR-39 lenses for all of our frames, which result in a beautiful product that is also designed to protect.