What are polarised lenses?

How to tell if lenses are polarised?

Hold the lenses in front of a LED or LCD screen and rotate them about 90 degrees. If the lenses are polarised, the screen will become darker or completely disappear. If the lenses are non-polarised, there will be no change.

Ultraviolet Light and UV 400 Lens Information

UV 400 provides 100% protection from ultraviolet light rays, UV 400 refers to the 400 nanometers of wavelengths that can be blocked including UVA and UVB according to All About Vision. The wavelength of UV radiation consists of UVA which measures around 315-400 nm, UVB measures at 280-315 nm and UVC which is measured around 100-280 nm.

All of Oscar Wylee’s UV lenses are UV 400 which means guaranteed protection for your eyes against the damaging effects of UV light including UVB and UVA. It is important to note that the dark tint and price of sunglasses do not necessarily equate to the level of UV protection that it offers.

UVC falls in the short-wavelength range and is the most harmful form of UV radiation, however, it does not reach the earth’s surface as it is filtered by the atmosphere according to the World Health Organisation. UVB is characterised as a medium wavelength, it does not penetrate past the superficial layers of the skin and is what contributes to burning and delayed tanning. These can advance the ageing of our skin and increase risk of developing skin cancer. UVA is long-wavelength and constitutes around 95% of the UV radiation that does reach the earth’s surface. UVA can penetrate into the skin’s deeper layer and is what causes the more instant tanning effect and similarly to UVB is a significant factor for faster ageing of the skin and development of wrinkles.