Home Lifestyle How to choose the right sunglasses? – Accessories – Fashion and style

How to choose the right sunglasses? – Accessories – Fashion and style

How to choose the right sunglasses?  – Accessories – Fashion and style

In addition to being an indispensable fashion accessory that emphasizes a certain style and image of their wearer, sunglasses must meet the functional requirements of protection and safety.

Not only ultraviolet radiation is harmful to our eyes, but excessively bright light as such. High-quality, well-chosen sunglasses, of course, neutralize negative effects, but just dark glasses, without UV filters, can only do harm, because they deceive the pupil, which does not narrow in bright light, absorbing even larger doses of UV.

Many of the problems that we have in old age are the result of neglecting sunglasses in our youth, since imperceptible microtraumas of the eyes, accumulating, give a tangible negative effect only over time. However, this time can be calculated in one or two seasons when wearing unsafe sunglasses. And the appearance of wrinkles around the eyes will not take long, if you do not wear sunglasses in the bright sun, constantly squinting at the same time. The ongoing known metamorphoses with the Earth’s atmosphere greatly aggravate the negative processes affecting the eyes and skin and require increased attention to this problem.

Eskimo gift

Even in the tomb of Tutankhamen, archaeologists found a thing similar to modern sun glasses: two thin cut emeralds connected by bronze plates. In ancient China, women wore lenses made of smoked quartz or smalt to protect their eyes from the sun and avoid wrinkles. The Japanese put on a strap on their heads, to which “shutters” for the eyes were attached. In India, strips of silk impregnated with resin were glued to the eyelids.

It is believed that the first glasses from the sun – bone shields with cuts limiting the light flux – appeared among the Eskimos. Glass sunglasses were produced about 200 years ago in France for the soldiers of the Napoleonic army. In 1929 in America, Sam Foster launched inexpensive glasses that were in demand on the beaches. During the Second World War, dark glasses became part of the mandatory equipment of American sailors. Then for the first time glass was used, cutting off the entire ultraviolet spectrum of sunlight. And in the 20th century, scientists began to deal with the problem of fully protecting the eyes from damage from sunlight and premature aging.

White, red, blue – take your pick…

So what to choose, glass or plastic? Glass guarantees UV protection, distorts objects less and reduces the possibility of scratches compared to its plastic counterpart. But glass lenses are not safe: they can break and, under adverse conditions, fragments often damage the eyes. They have high abrasion resistance, but are much heavier than plastic lenses, fog up and are more brittle. Glass lenses are not suitable for children.

Plastic lenses are lighter than glass and safer. But plastic, not treated with special means, just like the one that is “processed” by handicraft, transmits ultraviolet rays, and therefore harms the eyes. But there are lenses that have a special chemical ingredient that delays harmful radiation, however, in this case, the high quality of the plastic must be guaranteed. Such glasses should not be bought in random stalls and markets. In the manufacture of plastic lenses, such producing countries as Canada, Germany and France. Special chemical additives are introduced into the composition of modern plastic lenses for glasses. Various coatings are applied to the surface of glass and plastic. These are anti-reflective and antistatic, water-repellent, photochromic and photoprotective coatings and blackouts. These coatings on plastic lenses, single and multi-layer, guarantee absolute harmlessness to the eyes.

The basic principle of choosing dark glasses with plastic lenses is to choose those that do not let in ultraviolet rays. They are of two types: A and B. True, the second, B-rays, ophthalmologists consider more dangerous. On the labels of quality glasses there is an inscription: “Blocks at least 90% UVB and 60% UVA”. The numbers change, of course. This inscription is deciphered as follows: The lenses block out 90% of UV B and 60% of UV A. On the labels of branded glasses, the wavelengths that the lenses do not let through are also indicated. Complete protection against radiation is provided by goggles with an indication of 400 nm (nanometers). Their ultraviolet spectrum protects against wavelengths up to 400 nm. If the figure is below 400 nm, then the glasses partially pass near ultraviolet. There is another indicator – the refractive index: 1.4; 1.5; 1.6 etc. The higher the coefficient, the better the lens, i.e. thinner and more transparent.

The quality of plastic lenses can be determined independently. Lay the lens on a cloth with a square weave of fabric. The better the lens, the less will be the distortion of the tissue structure covered by the lens. The second “ultraviolet” test takes time to wear – the area around the eyes, protected by good glasses, will remain untanned.

The color of the lenses is a separate conversation. Photochromic lenses – chameleons – change color depending on the lighting, creating protection and comfort for the eyes. But they can darken in different ways – stronger and weaker – one is stronger than the other, but they must be darkened evenly, otherwise the eyes will get tired. By the way, on a sunny day, the eyes are more comfortable behind black or dark brown lenses. But on cloudy days, the world looks gloomy in these glasses. Considering that without bright light, the pupils dilate and are exposed to even more ultraviolet shock, then dark lenses can be replaced with gray, smoky, pink, yellow, blue, green or colorless – as long as they are made of quality material, make the pupils narrow and really protect the eyes . But if, thanks to such glasses, the world around has changed color – this is a fake. High-quality colored lenses only slightly change the shade. And the violation of the usual range in favor of one color scatters attention, a person in such glasses quickly gets tired. Colored lenses can create problems for people who need accurate color perception, such as drivers.

In addition, when choosing sunglasses, it must be borne in mind that they must protect not only the pupil, but also the skin around the eyes. Then there will be less wrinkles in this area.

Now about the frame. The most practical frame material is nylon because it easily bends and returns to its original position. For the manufacture of frames, cellulose acetate, special types of plastics, steel, and titanium alloys are also used. To pick up glasses, you need to try on. This is the only way to determine how comfortable they are – whether the nose pads press on the bridge of the nose, whether the temples are tight. When tilting the head, glasses should not fall off or slide down to the tip of the nose. The size of the frame should be proportional to the size of the face. If the face is square, you need a frame with a slightly rounded shape to soften the line of the cheekbones, a round one with straight or angular lines of saturated colors that visually reduce the face. If the face is elongated, the frame should cover most of it. With a sharp chin, frames with a thin rim and vertical lines without massive details and bright colors are suitable. And on oval faces, most frames look good.

All sunglasses must comply with safety requirements approved by European Directive 89/686/EEC and Technical Directive EN 1836-2005 (this information is indicated in the certificate attached to the glasses).


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