Sunglasses Lens Tints Help
Grey Smoke lenses are considered neutral because they do not enhance contrast nor distort colours, they give a natural colour definition and are ideal for bright sunny days, usually UV filter category 3.
Grey-Green lenses (often known as G15) are the most popular general purpose choice, they give a uniform absorption of colours throughout the spectrum allowing colours to be seen exactly as they are, usually UV filter category 3.
Green lenses give a uniform absorption of colours throughout the spectrum allowing colours to be seen exactly as they are, usually UV filter category 3.
Brown lenses give some minimal colour distortion but have contrast enhancing properties particularly in diffused light and they increase depth perception, a good all weather tint, usually UV filter category 3.
Amber, Magenta, Orange, Pink, Rose and Vermilion lenses have contrast enhancing properties particularly in diffused light and they increase depth perception. They give some colour distortion and are best for medium light conditions, usually UV filter category 2.
Copper lenses heighten visual acuity, improving contrast and depth perception in variable light conditions and are particularly suited for driving, they provide sharper contrast and image definition by filtering blue light and reducing road glare whilst preserving a natural colour balance for comfortable viewing in the day-light, they are designed to highlight the critical driving colours of red, amber and green, usually UV filter category 2.
Blue lenses are sometimes known as RGB (reduced glare blue) and are often used by tennis professionals and line persons, it is a contrast lens and reduces glare from visible white light such as light reflected from mist, fog, snow and water, usually UV filter category 2.
Yellow lenses are great for hazy, overcast or foggy condition helping to relieve eye strain and fatigue, they enhance contrast and depth perception and are especially effective in flat light or overcast conditions helping to increase visibility, usually UV filter category 0 in which case they are also suitable for night driving.
Clear lenses are used typically to protect the eyes from impact and the elements, ideal for very dull or low light conditions and night time or indoor use, UV filter category 0.
UV FILTER CATEGORIES
There are 5 filter classifications for sunglasses, the number is an indicator as to how much light passes through the lens, all categories block harmful UV rays.
Category 0: 80 to 100% light transmission - clear or very light tint, used mainly for eye protection or fashion and does not significantly reduce the glare from bright sunlight.
Category 1: 43 to 80% light transmission - light tint, used mainly for eye protection or fashion and does not significantly reduce the glare from bright sunlight.
Category 2: 18 to 43% light transmission - medium tint, used for average sunny weather and driving.
Category 3: 8 to 18% light transmission - dark tint, used for bright sunlight, driving and general purpose wear.
Category 4: 3 to 8% light transmission - very dark tint, only for very bright conditions and should not be worn whilst driving or operating machinery.