Summer mood in sunglasses

Summer mood in sunglasses The sunglasses we use to protect our eyes from the bright sun as well as ultraviolet light are called sunglasses. The lenses of sunglasses can be dioptric and are used for people with low vision. Our eyes must be protected from direct sunlight because ultraviolet light can contribute to such dangerous diseases for vision as conjunctivitis, glaucoma, and cataracts.

A little history:

The inhabitants of the Far North were the first to protect their eyes from the sun. The blindingly white snow and bright sun contributed to the development of snow blindness. Back then, eyeglasses looked nothing like today's glasses. The northerners cut narrow slits in pieces of tree bark for the eyes and thus protected their eyes from the blinding light. Leather, bone, and other materials were also used for this purpose.

During the excavations of the tombs of Ancient Egypt, emerald glass plates were found, held together with bronze plates. The Roman emperor Nero watched the gladiatorial fights closely using lenses cut from emerald. In the 12th century, the Chinese used plates of rare smoky quartz to protect them from the bright sun. And wealthy Indian beauties used pieces of fine silk that were impregnated with a special resin to protect them from the sun.

The first sunglasses in Europe resembling modern sunglasses appeared in the middle of the 18th century. At that time, they were not used as protection from the sun, it was believed that glass of green shades makes vision better. In the 21st century, glasses with yellow and brown glass were worn by people who had painful sensitivity to sunlight, and the blind hid their eyes behind black lenses.

The first commercial batch of sunglasses was produced for Napoleon's army, who had to fight under the scorching sun in Egypt. The glasses were blacked out with soot, and you could see practically nothing through them. In spite of this, the glasses were very expensive.

The emergence of modern eyewear.

In the twentieth century, the accelerated pace of scientific and technological progress also contributed to the development of optics. The first eyeglasses were developed for aviation. In the beginning, pilots made their own protective glasses from the sun by painting them with watercolor paint.

In the 20's among the first movie stars, sunglasses became a fashion attribute for the first time. Coco Chanel played a not insignificant role in the spread of this accessory. At that time women wore large aviator sunglasses. Such glasses covered half of the face, also protecting its delicate skin from the sun's rays.

Summer mood in sunglasses In the 1930s in America, inventor Edwin Land first invented polarizing lenses that reflect the sun's glare. This was a real breakthrough in the sunglasses market. At first, sunglasses with polarizing lenses were worn only by athletes, but soon millions of other people appreciated their benefits.

Polarizing glasses are made in several colors. The gray as well as brown lenses are considered the most comfortable. Orange and yellow lenses are considered to improve image contrast. That is why glasses with yellow lenses are recommended for athletes engaged in shooting. Brown lenses are recommended for rowing, alpine skiing or golf. Gray polarizing glasses can be worn for a long time.

From an ordinary practical thing, glasses have become a part of the image, emphasizing the personality of the owner. So, for example, in the famous movie "The Matrix" dark glasses emphasize the character traits of each hero. It is necessary to admit that in the modern world sunglasses are designed not only to protect our eyes from sunlight, but are an integral part of our image.

How to choose the right glasses?

The main purpose of sunglasses is to protect the human eye from the effects of harmful ultraviolet rays. In this case, the degree of darkness of the glasses is not the most important thing. An important characteristic of safety glasses is light transmission, it depends on the degree of darkening of the glasses. Before choosing glasses it is necessary to define at once when and where you plan to wear them.

Sun glasses filter categories:

1. нулевая группа – это слабо затемненные очки, защищающие глаза от света в облачную погоду (пропуск света 80-100%);

2. the first group includes sunglasses that protect from the sun in the spring or fall (43-80%);

3. The second filter group is capable of protecting against the brighter sun (18-43%);

4. The third group of darkening lenses protect against the active summer sun (light transmission 8-18%);

5. The fourth filter group (light pass 3-8%) can protect against bright sunlight at a ski or sea resort. Glasses of such glasses are very strongly tinted, so they should not be worn by drivers. For driving it is better to use glasses with the third and second filter groups.

Не стоит покупать солнцезащитные очки на улице. Никто не может гарантировать качество, а также что такие очки не навредят вашим глазам. Помните, что вы покупаете не только модный атрибут, но, в первую очередь – весьма полезное средство для защиты ваших глаз от воздействия на них ультрафиолетовых лучей.