Sunglasses | Optical Centre Smartbuyglasess UK

What Does UV400 Protection mean? 

What is UV protection?

High exposure to ultraviolet (UV) rays emitted by the sun can be harmful to your skin and eyes. Plus, quite often these UV rays can reflect off surfaces such as water and buildings on cloudy days. UV protection consists of anything that blocks a percentage of the exposure from UV rays, such as sunblock or UV protection glasses. 

UV400 Protection

UV sunglasses are sunglasses that block UV rays from reaching your eye. Ideally, you should aim for UV400 sunglasses, which blocks 100% of UV rays. With UV400 protection you can completely eliminate UV exposure to your eyes. Long exposure to these UV rays could cause short and long term damage to your eyes. Long term effects of not wearing UV400 protection could include damage to the retina, cataracts, or even cancer to the eyes or eyelids. 

SmartBuyGlasses has a wide range of UV sunglasses to choose from, including the popular SmartBuy Collection Adel design. With sports brands like Oakley, you can get sunglasses such as the Oakley OO9102 model with UV400 protection for the best price. 


How to tell if sunglasses have UV protection

If you have UV sunglasses,the product label should say “100% protection against UV400.” If you’re not sure, you can take your sunglasses to an eyecare professional who can test for UV protection with a photometer. 

These are the following classes of UV protection: 

  • 0 – Allows 80-100% lof UV light
  • 1- Allows 43-80% of UV light
  • 2 – Allows 18-43% of UV light
  • 3 – Allows 8-18% of UV light
  • 4 – Allows 3-8% of UV light (useful in extremely sunny conditions but unsafe for driving)
  • Again, for the best protection you should consider sunglasses with UV 400 protection. 

UV sunglasses vs. polarized sunglasses

The main function of polarized sunglasses is to reduce glare. That’s why these lenses are ideal near water, even considered the best fishing sunglasses. Polarized lenses alone, however, do not protect from UV rays. In order to be considered UV protective sunglasses, the polarized lenses must have a UV filter in them. 

While not all polarized sunglasses offer UV protection, some sunglasses can have both. For example, the Ray-Ban RB3183 Active Lifestyle sunglasses offer both polarization and UV protection. 

UV protective glasses

Have you heard of Crizal lenses? These lenses provide you with UV protection glasses to reduce glare and better protect your eyes from harmful light rays. The lens technology offers superior protection against harmful UV radiation. UV protective glasses are good to have for cloudy days or anytime you’re under the sun without UV sunglasses. 


Learn more about choosing the best lenses for you, or check out the Oakley Prizm lens technology Coupons on