How to choose sunglasses: practical advice

Contents:

• We select the "right" points: the basic steps
• Lenses: what they are
• Glass or plastic
• Choosing a frame
• Which glasses suit different types of people
• Read the label
• How to look after sunglasses

Sunglasses - must-have any self-respecting lady. This stylish accessory with a lot of indisputable advantages. When we choose sunglasses, first of all, pay attention to fashion trends and the appearance of the product. Not many people realize that a stylish frame and purple lens - not the main consideration when selecting points. Consider the basic practical recommendations, which it is desirable to adhere to when choosing sunglasses accessories.

We select the "right" points: the basic steps

1. First you need to decide for what purpose you need sunglasses: You can change the brightness of the image to protect it from UV rays or infrared radiation. High-quality lenses provide comfort, protect the eyes from the harmful effects and do not affect color reproduction. If you have vision problems, before you buy is better to consult an ophthalmologist.
2. Pay attention to the quality of the material from which the models are made. A good option - quality polycarbonate lenses that have the highest degree of protection from the sun's rays. Be careful when choosing glasses with dark lenses, it is better to stay in brand models, so as not to harm the eyesight. For dark glass pupil dilates and if sunglasses are not sufficient protection, exposure to sunlight can be very intense.
3. For inserts, which are attached to the acquisition, it must necessarily be given information about the degree of protection from UV lenses. Now there are several categories of lenses:

• "0" - the lens transmit light at 79-100%, they offer minimal protection from sunlight.
• "1", "2" - light transmittance of 45-79%, or 18-45. This model - a great option for the urban environment and everyday wear.
• "3" - transmits rays lens 7-20%. These points are well suited for a beach holiday season and in the country.
• "4" - lenses transmittance is 3-7%. This filter is considered to be the darkest, it protects the retina in an extremely hot sunny countries and in the highlands.

Points latter two categories offer the highest-quality protection against infrared and ultraviolet rays.

Lenses: what are they?

Most often sunglasses are available with conventional lenses of various colors. But over time, began to emerge with the items "advanced" coatings. Very often, customers do not quite understand the meaning of concepts: a lens with "photochromic" or "polarization" coating. Let's see what's what.

• Polarization Floor

This coating protects against blinding glare and improves contrast. Points such lenses are ideal for motorists. To check whether the proposed model polarization coating is sufficient to use the shop optics, where a special screen or the label you can see the image, imperceptible to the naked eye.

• Anti-reflective (anti-reflection) coating

It removes the "ghosting" and glare on the rear surface of the glass. What is meant? It so happens that we see in his eyes the reflection points or objects that are behind us. "Ghosting" significantly impair the clarity of vision, especially while driving a car at night. This coating eliminates this problem.

• Photochromic coating

Such a lens is called a chameleon, because they change color (lighter or darker) depending on the lighting. Models with the photochromic coating is very convenient for people who have vision problems, but do not want to repeatedly change the points, entering the room or walking on the street.

• Mirror coating

It is a lens tinted than the regular version. They discharged heat rays and are recommended for skiing or swimming.

And a few moments. If you put on your favorite sunglasses with colored lenses, and the world instantly changed color, you should know that before you a real fake. Branded lenses properly transmit color, only slightly changing their color. Violation of the usual for us of colors in favor of one of the colors is very distracting and tiring to the eyes. In addition, accurate color perception is very important for some categories of people, such as motorists, so the color of the lens does not fit all situations.

The most optimal is considered gray (from light to deep shades and) and brown. Grey provides a clear perception of reality, and brown - the contrast. Drivers are advised to choose yellow, the filter does not strain your eyes and helps to better perceive the space. Orange lenses reduce the dazzling effect of light in the dark, and the green surroundings give the contrast in the absence of sufficient light and protect from bright light.

Avoid lenses, the world in which it seems to purple or blue (literally). In these glasses, you run the risk of losing almost one summer. The predominance of blue and violet end of the spectrum inhibits motility and the rate of human thinking, and the blue - enhances the effects of light scattering than the causes risk of glare, for example, the headlights of oncoming vehicles.

Glass or plastic?

Lenses for sunglasses are made of three materials: glass, acrylic and polycarbonate plastic. Glass glasses - the safest option, since they do not pass ultraviolet rays. But over time, gradually replaced the plastic glass, because it is more practical and easier. Spectacles with plastic lenses passed UV light and shade deceives the eye, so that the pupil dilates and takes all the negative wave of the sun. Over time, these effects can lead to impaired vision and cataract.

Plastic glasses, it is desirable to buy supplements that help to delay radiation. At the time of purchase, pay attention to the label, the most harmful rays - type B, so the product must be protected from them almost completely. Moreover, if the label boundary mentioned wavelength is better to give preference points with a value of about 400 nm.

Choosing a frame

The most practical material for the manufacture of nylon frame has always been. He bends well and can return to its original position. What sways plastic, these rims quickly break down, so it is better if the inside of the plastic frame and the metal has passed.

When choosing glasses, pay attention to the quality of the frames. A couple of times, open bow, to bend them. A good frame should be elastic and not rigid. Check the screws that attached the bow, whether they are well screwed. Finally, try on glasses. Whether they are comfortable, not too tight if the bow, do not press you on the bridge? If you tilt your head, glasses do not have to crawl on the tip of the nose or even topple. By the way, if the frame is initially stiff and uncomfortable, it was and will remain, one should not hope that the glasses "spread."

What are the different types of glasses suitable for the face?

When we reflect on the question: "How to choose sunglasses? "Weigh the" pros "and" cons ", and select the firm model necessarily think about what the version suited to my type of person. Undoubtedly, the situation happens to you when the window of a perfect model, but you do not go and everything. Let's face it.

• Oval face

Universal type that fits absolutely any form of points. And in order to avoid disparities, the width of the product should be the same as the widest part of the face.

• Round face

This type of glasses are contraindicated with glass in the form of ovals because they more round face. In this case it is better to give preference to a rectangular shape, or an embodiment in the form of a cat's eye. As for the frame, the glasses will look good with a thin rim or no rim.

• square face

Here, by contrast, are ideal points, or oval-shaped with a rounded rim. It is advisable not to choose the rectangular models to more not to aggravate the corners.

• Extended (long) face

In this case the problem is - not lengthen the face, and make it visually less. This will help you glasses, stretched wide or wider rim.

• Triangular face (heart)

To soften the pronounced cheekbones, better to choose rimless glasses oval or round shape.

Read the label

Like any other product, a sunglasses label attached. How to understand what is written there? If you see the sign, for example, «blocks at least 95% UVB and 60% UVA», means that the glasses do not pass 60% of ultraviolet best type A and 95% type B, i.e. a product protects against two of the most harmful types of radiation, .

The inscription «plastic» means that the product is made of plastic. Pay attention to the name of the company, the country of manufacture. And in order to verify whether the authentic glasses, can be compared to the brand name on the lens or the inside of the arch with the name on the label. In addition, each brand markets its products in branded boxes.

How to look after sunglasses

To purchase your last a long time, store it properly. You can buy a semi-hard case or a hard case. Do not put the glasses on a table or any other surface of the lens down, as they can easily get dirty and scratched. Do not forget to clean the lens thin chamois or lint-free cloth. These materials are very gently clean the lens from dirt.

Regardless of the degree of darkening lenses do not look at the sun, as if wearing glasses skin around the eyes still light up, the beacon that they must be replaced. Sunglasses should not only be a beautiful accessory, but also good protection against radiation.