The Categories Of Glass: Discover Them And Understand Them!

> What does a sun glasses category?

The category of lenses of the sunglasses tells you the percentage of light that passes through the glass. These numbers should not be confused with UV protectionindex, which tells you the ability of the lenses to filter UV. Each glass has a percentage of transmission of visible light that corresponds to the light produced by the Sun that glass will let through.

As a reminder, 100% of the ORAO glasses are guaranteed 100% ANTI UV, whatever the category of lenses.

In total, there are 5 categories of lenses (from 0 to 4). You should know that the class is high, less light passes through glass and less the wearer of sunglasses is dazzled. Therefore, the choice of the category of drinks based on the utility that will have your sunglasses. It is important to choose depending on the weather conditions.

Some of our so-called photochromic lenses have glasses. These glasses fit their tint to the ambient light. They are essential for the practice of outdoor sports whose brightness can be changing (move in as wood, passages clear, practical sports at the sunrise or the sunset etc..). More concretely, a photochromic glass has so many categories, a category 1 glass > 3 is likely therefore to adapt to category 1, 2 or 3 according to the brightness outside.

 

See our photochromic glasses.

 

> The category

 

This category includes all white lenses which are not tinted, or very little. Glasses consisting of glasses of category 0 are designed to be worn in sport Interior, by night or in bad weather (rainy, cloudy). They also serve as eye protection that will protect you from dust and wind. These glass are treated anti-reflective to limit the inconvenience caused by the parasitic reflections and their white shades darken not vision.

 

Glasses of category 0 leave cross between 80 and 100% of the visible light.

 

> The category

 

Glasses consisting of glasses of category 1 are designed to be worn in bad weather, when there is fog and for sports in the forest where there is a low light. These clear lenses are most often yellow in color. They improve contrast and glare-fighting.

 

Glasses of category 1 leave cross between 43 and 80% of the light visible.

 

> The category

 

Ideal when a variable time (alternating between Sun and clouds), composed of category glasses 2 glasses are to choose for medium light conditions.

 

Glasses of category 2 leave cross between 14 and 43% of the light visible.

 

> The category

 

This category of glass is the most common. Glasses consisting of glasses of category 3 are designed for sport by strong light. These glasses, often gray or Brown, agree not sunny in plain or average elevation with a high brightness. Their hues restore the natural color vision.

 

Glasses of category 2 leave cross between 8 and 17% of the light visible.

 

> The category

 

The glasses in this category are very dark and reserved for the solar luminosities exceptional and very intense: at high altitude or in the tropics. Composed of glasses of category 4 sunglasses are preferable when the Sun is extreme and very dazzling. Their hues, usually Brown, increase contrasts.

 

These lenses are very dark.

 

Category 4 lenses leave cross between 3 and 8% of visible light.

Attention, the use of a mount with glasses of category 4 is prohibited when driving because they alter the vision and the perception of colors!

 

Find all glasses Orao adapted to the practice of sport.

 

> Summary table of the different categories of glass

SOLAR CATEGORY VISIBLE LIGHT TRANSMISSION USES
Category 0 80-100% This category includes all white lenses that are tinted no or very little. Glasses consisting of glasses of category 0 are designed to be worn in sport Interior, by night or in bad weather (rainy, cloudy). They also serve as eye protection that will protect you from dust and wind.

 

Category 1 43 to 80% Glasses consisting of glasses of category 1 are designed to be worn in bad weather, when there is fog and for sports in the forest where there is a low light. These clear lenses are most often yellow in color. They improve contrast and glare-fighting.
Category 2 14 to 43% Ideal when a variable time (alternating between Sun and clouds), composed of category glasses 2 glasses are to choose for medium light conditions.
Category 3 8-17% This category of glass is the most common. Glasses consisting of glasses of category 3 are designed for sport by strong light. These glasses, often gray or Brown, agree not sunny in plain or average elevation with a high brightness. Their hues restore the natural color vision.
Category 4 3 to 8% The glasses in this category are very dark and reserved for the solar luminosities exceptional and very intense: at high altitude or in the tropics. Composed of glasses of category 4 sunglasses are preferable when the Sun is extreme and very dazzling. Their hues, usually Brown, increase contrasts.

 

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