About this deal
Sunglasses For Sport sell a wide range of Category 4 sunglasses – probably the largest selection available in the UK. But what are they and where are they used? The lens tint category number for eyewear equates to a percentage of the VLT (Visible Light Transmission) – basically how much light the lens lets through, as follows: They are ideal for activities like skiing, mountain climbing, high altitude hiking and desert trekking: conditions where high glare or intense sunlight is experienced. Category 4 lenses are also suitable for eyes that are sensitive to bright light, a condition called photophobia. It’s a common symptom that’s associated with several different conditions, ranging from minor irritations to serious medical emergencies. Can Category 4 sunglasses be used when driving