The category of glasses of sunglasses gives you information on the percentage of light that passes through the glasses. These numbers must not be confused with the UV protection rating, which tells you the UV-filtering capacity of the glasses. Each glass thus has a percentage of transmission of visible light which corresponds to the brightness produced by the sun that the glass will let through.

As a reminder, 100% of the ORAO glasses are guaranteed 100% ANTI UV, regardless of the category of the glasses.
There are in total 5 through. of glasses (from 0 to 4). You should know that the higher the category, the light that passes through the glass is lesser which in turn reduces the dazzlement of the wearer. Thus, it is important to choose it according to the weather conditions and level of usefulness.

Some of our glasses have photochromic lenses. These glasses adapt their hue to the ambient brightness. They are essential for the practice of outdoor sports whose luminosity can be changing (passing in underwood, cloudy passages, sporting practice at sunrise or sunset etc.). More specifically, a photochromic glass has several categories, so Category 1> 3 glass can adapt to category 1, 2 or 3 depending on the external luminosity.


CATEGORY 0

This category includes all white glasses that are not tinted or very little. Glasses made of category 0 UV-filtering are designed to be worn in indoor sports, at night or in bad weather (rainy, very cloudy). They also serve as goggles that protect you from dust and the wind. These glasses are treated anti-reflective to limit the discomfort caused by parasitic reflections and their white tints do not darken the vision.

Category 0 glasses allow 80 to 100% of visible light to pass through.

glass categories


CATEGORY 1

Glasses made of category 1 glasses are designed to be worn in bad weather when there is fog and for sports in the forest where there is low light. These clear glasses are usually yellow in colour. They improve the contrasts and make it possible to combat glare.

Category 1 glasses allow between 43% and 80% of visible light to pass through.

class categories


CATEGORY 2

Ideal for variable weather (alternating between sun and clouds), glasses made of category 2 glasses are suitable for medium light conditions.

Category 2 glasses allow 14 to 43% of visible light to pass through.


CATEGORY 3

This category of glass is the most widespread. Glasses made of category 3 glasses are designed for sport in high brightness. These glasses, mostly grey or brown, are suitable for sunny weather in plain or medium altitude with high brightness. Their colours reproduce the natural vision of the colours.

Category 2 glasses allow between 8 and 17% of visible light to pass through.

glass categories


CATEGORY 4

The glasses of this category are very dark and reserved for exceptional and very intense solar luminosities: in high altitude or colour the tropics. Sunglasses made of category 4 glasses are preferred when the sun is extreme and very dazzling. Their shades, usually brown, increase the contrasts.These glasses are very dark.

Category 4 glasses allow between 3 and 8% of the visible light to pass through.

Caution, the use of a frame equipped with category 4 glasses is forbidden while driving because they alter the vision and the perception

glass categories


Summary Table

SOLAR CATEGORY

TRANSMISSION OF VISIBLE LIGHTUSESPICTO
Category 080 to 100%

This category includes all white glasses that are not tinted or very little. Glasses made of category 0 glasses are designed to be worn in indoor sports, at night or in bad weather (rainy, very cloudy). They also serve as goggles that protect you from dust and the wind.

 glass categories
Category 143 to 80%Glasses made of category 1 glasses are designed to be worn in bad weather when there is fog and for sports in the forest where there is low light. These clear glasses are usually yellow in colour. They improve the contrasts and make it possible to combat glare. glass categories
Category 214 to 43%

Ideal for variable weather (alternating between sun and clouds), glasses made of category 2 glasses are suitable for medium light conditions.

 glass categories
Category 38 to 17%This category of glass is the most widespread. Glasses made of category 3 glasses are designed for sport in high brightness. These glasses, mostly grey or brown, are suitable for sunny weather in plain or medium altitude with high brightness. Their colours reproduce the natural vision of the colours. glass categories
Category 43 to 8%The glasses of this category are very dark and reserved for exceptional and very intense solar luminosities: in high altitude or in the tropics. Sunglasses made of category 4 glasses are preferred when the sun is extreme and very dazzling. Their shades, usually brown, increase the contrasts. glass categories

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