Catergory 4

Shades of grey:

• Cat 0 lenses

  Cat 0 lenses are either clear or have a very light tint, they are used in safety glasses, sports where you want the maximum light to pass through the lens like football and a range of other in and outdoor sports

• Cat 1 lenses

  Cat 1 lenses in sport are typically yellow used for low light conditions.  You would see yellow lenses in glasses and goggles for sports like skiing, shooting and cycling.

• Cat 2 lenses

  Cat 2 lenses in sport are most commonly amber in colour. Cat 2 lenses make a good imtermediate lens and can be used for both dull and bright days. Sports where you would see this lens are Skiing, cycling and shooting.

• Cat 3 lenses

  Cat 3 – is the typical sunglass lens providing protection from both visible and UV light.  These lenses will usually only allow less than 20% LVT of visible light to penetrate the lens.  This means that they will block out 80%+ of brightlight. These lenses would be used in a wide range of out door sports Cricket, fishing, golf, sailing, tennis, skiing.

• Cat 4 lenses

  Cat 4 – Lenses are much more specialised and are used for extreme applications. They allow only a small percentage of light to pass through the lens approw 5 to 8% LVT. The lenses are used for mediacal condition such as photophobia, after eye surgery. Other extreme uses would be at high altitude mountaineering, out in the artic.