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Sunglasses Information

Trade Sunglasses products are inexpensive but there should be no compromise in quality or effectiveness of the performance.

All of our sunglasses meet or exceed the standards set out by the European directive 89/686/EEC in accordance with standard Pr-EN-1836:1997 (sunglasses for general use).

Our sunglasses:

• are individually CE marked and conform to all relevant European legislation
• are UV400 protective

UV rays can be very harmful to the eyes but our sunglasses help to block these rays by preventing them from reaching our eyes. Exposure to UV rays can cause eye damage, but sunglasses marked with UV400 means the lenses block all harmful rays by preventing wavelengths of up to 400 nanometers. This covers UVA and UVB rays. UVC rays cannot pass through our atmosphere and are therefore unable to reach us.

Polarisation

When light is reflected from shiny materials it becomes polarised. Sunglasses made with polarising filters reduce the amount of light transmission and glare reaching the eyes. Bright conditions can cause people to strain their eyes and the glare can also reduce visibility, so using polarised lenses creates a much clearer, comfortable view. Glare in certain conditions can reach 10000 to 12000 lumens. As eyes are only comfortable with up to about 3500 lumens, in bright light the glare can make people squint and in extreme conditions temporarily blind. Techniques such as polarisation and mirrored lenses can be used in order to drastically reduce this and offer clearer, more comfortable vision.

Lens Colours

Lens colours vary according to style, fashion requirements and purpose. For general use, green, grey or brown lenses minimise colour distortion, which could be dangerous if driving. Grey lenses are considered neutral because they do not enhance contrast or distort colours, while brown and green lenses cause some minimal colour distortion but have contrast-enhancing properties. Brown lenses are also very efficient at blocking blue light which makes them a popular choice for sports and are ideal for driving because they don’t block any red, green or yellow light (traffic lights). Blue or purple lenses offer no real benefits or disadvantages, and are mainly used for fashion purposes.