Cat 2 lenses are the most common category to be found in sunglasses, for general use they provide good protection from visible light and from UV rays. This lens will have a tint which allows through less light than category 1 but more light than category 3. General Purpose, watching and taking part in sport.
Dark sunglasses may still allow UV rays to enter the eye. Sunglasses are marked with a filter category from 0-4, where 4 is the darkest lens. * UV protection has nothing to do with lens colour.
Question & Answer
Land vehicle driving. Lenses of fixed tint are graded according to the optical density of the tint; in the UK sunglasses must be labelled and show the filter category number. Lenses with light transmission less than 75% are unsuitable for night driving, and lenses with light transmission less than 8%
UV Protection in Different Categories of Sunglasses. Though it is important to always look for labels when buying sunglasses to protect your from UV rays, you should also recognize the 3 categories of sunglasses that comply with industry standards and know what they mean in terms of UV protection.
Up to standard. Lens category 3: Sunglasses Similar to category 2, these sunglasses provide a good level of UV protection. Lens category 3 glasses also provide a high level of sun glare reduction. Lens category 4: Sunglasses These are special-purpose sunglasses that provide a very high level of sun glare reduction and good UV protection.
The best sports sunglasses block not only 100% of UV light, but also high-energy visible radiation (HEV), otherwise known as blue light. These are often labelled “Blue Blockers.” Good sports sunglasses are injection-molded into their wrapped shape, which lowers the amount of distortion through the lenses. Lower-quality sunglasses are bent
UV 400 sunglasses are not able to offer the optimal amount of protection if there is room for sunlight to get in on the sides of the frames, under the eyes, or at the top of the eyebrow ridge. Individuals shopping for UV 400 women’s sunglasses should bear in mind that some fashion sunglasses may not offer adequate protection to the eyes.
Darker sunglasses decrease the amount of visible light that passes through the lenses compared with lighter lens tints, but they don’t necessarily provide greater protection from UV rays (which are invisible). For adequate protection, have your optician make sure your sunglasses block 100 percent UV, regardless of the color of the lenses.
10% OFF EVERYTHING WITH CODE PAY10. In order to determine how light or dark sunglasses lenses are, they are given a Category Rating ranging from 0 through to 4. The rule of thumb is the higher the number, the darker the lens colour. The table below can be used to help you decide which lens category suits your needs.
How can I tell if my sunglasses are UV protected? Update Cancel. Answer Wiki. 10 Answers. Ronak Furia, Optician by Choice! After confirming the appearance of the strange symbols, you can proceed with the testing of your sunglasses. Beam the UV light through one of the lenses and onto the credit card or money. If the symbols are still
Shop for women’s sunglasses, UV protective sunglasses, cars sunglasses, light-up sunglasses and polarized UV sunglasses for less at Walmart.com. Save money. Live better. Skip Header. Hello. Sign in . FREE 2-Day Shipping Customer Rating. 4 Stars & Up. 3 Stars & Up. 2 Stars & Up. 1 Stars & Up. See more customer ratings. UV Sunglasses.