Polarization. What's this?

Polarized lenses have been known for more than 75 years - since, as the founder of the company «Polaroid» Edwin Land invented in 1929 and released the first samples. Early polarized lenses were exclusively planned and in demand only the adherents of winter and water sports.

Today, the benefits of these lenses appreciated not only by athletes - professionals and amateurs, but also ordinary consumers. In addition, thanks to radical improvement of manufacturing technology and optical properties have become more common prescription polarized lenses.

Some particles or surface property are completely or partially polarized light, depending on the initial angle of incidence and nature of the reflecting surface. Bright horizontal surfaces such as water, wet asphalt, sand, snow, ice, car bodies, - the main sources of polarized light in our environment. When light falls at a certain angle to the similar surface, it is reflected and becomes polarized.

Polarized light creates a so-called optical interference or shine. These disturbances result in poor visibility, cause blurred vision, make people squint and interfere with driving, skating, fishing and many other activities. The best way to protect your eyes from the light are polarized lenses that do not pass the most harmful horizontal component of the polarized light.

All spectacle polarized lenses have a certain color. The earliest of these were green, now produced a variety of lens colors: brown, gray, yellow, green and others. Color influences on vision and comfort to the user of various situations and under a variety of lighting conditions. Each of the above color has its own characteristics and advantages.

Gray - reduces the total amount of visible light without disturbing color. Lenses of this color provide user comfort during long term wear and recommended for driving and fishing.

Brown - provides a high contrast. Brown lenses are recommended for training in sports such as golf, skiing, rowing.

Yellow - improves contrast, filters out the blue component of the visible spectrum. Yellow lenses can be recommended to practice shooting and driving in low light conditions.

Rainbow - gray on top and pink at the bottom of. These lenses reduce brightness improves both the top and the bottom of the contrast that can be useful, for example, when working on the computer.

Indications for use of polarizing lenses

1. Driving. Polarized lenses protect the eyes from the blinding glare produced when light is reflected from the windshield, pavement, other cars, and others. It looks like the image in the sunny weather glasses without polarization and polarization:

And in the rain:

2. Increased sensitivity of eyes. Especially recommended for older people who are more sensitive to glare and, in addition, they needed more time to restore normal vision after blindness.

3. Patients after eye surgery. Protection from blinding glare is particularly necessary after corneal surgery and cataract.

4. Sports in the open air. Polarizing lenses protect the eyes from the glare produced by the reflection of light at the flat surface (snow, ice, water, roadbed et al.). And under certain atmospheric conditions (rain, fog, smoke, etc.). Furthermore, all polarization lenses provide complete protection from UV radiation.

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Polarization. What's this?