KOO Glasses Demos

VLT

VLT or visible light transmission is the amount of light that passes through the glass to reach your eye. For example, a dark-tinted lens will have a low percentage of VLT, while a light-tinted lens will have a higher percentage of VLT.

FILTER CATEGORIES

Category 0

Light transmission 80-100% • Clear or very light filter. Usually sports or protective glasses designed to guard against wind, dust, or debris, but not against the sun.

Category 1

Light transmission 43 - 80% • Very lightly tinted lenses, generally yellow or orange, suitable for lower sunlight exposure or protection against wind or dust.

Category 2

Light transmission 18 - 43% • Medium dark filter suitable for medium sunlight exposure and casual wear. Their tint is slightly lighter than usual. Can be used for spring and autumn walks on sunny days. They will also be helpful while driving and frequently moving between shade and sunlight.

Category 3

Light transmission 8 - 18% • Dark filter suitable for intense sunlight exposure at the beach or in the city. This category is typical for most types of sunglasses. They are perfect for summer as they offer a higher level of protection against sunlight than the previous category.

Category 4

Light transmission 3 - 8% • Very dark filter for very intense sunlight exposure. Sunglasses for the mountains or deserts and anywhere the sun is not only extremely strong but also reflects a lot. These sunglasses cannot be used for driving.