On cloudy or foggy days, sunglasses seem to be tasteless? This is not the case. Not to mention that part of the ultraviolet rays can pass through the clouds and continue to damage the retina, as long as you are exercising, especially high-speed exercise (such as cycling or running), sand and dust flowing in the air, rain and snow from time to time, or even lost Insects can threaten your eyeballs.
Not only that, a pair of high-quality modern sports sunglasses can also enhance our visual ability. According to statistics, more than 70% of our movements are guided by our vision. The suitability of the sunglasses will directly relate to the wearer’s outdoor sports performance. .
Sports sunglasses, common equipment on the top trail running event UTMB. Photography: Matt Trappe
When walking in the city, choose sunglasses, look good, and function second. Traveling through the mountains and wilds is based on function and aesthetics. There are thousands of good-looking standards, and there are traces of functional standards. A pair of sunglasses opened to see, nothing more than:
Frame. lens.
Let me talk about the frame first.
Someone is playing running and running very fast, so he has very high requirements for the weight of the frame (for example, lighter than 30g). Someone's activities are fierce, and there is a possibility of eyes falling and being squeezed. Then he definitely hopes that the frame has a certain degree of toughness, not brittle, and resistant to construction. And some people have limited budget... Various needs, various supplies: (Chemical term early warning)
In fact, the sports frames on the market are basically nylon-based hybrids. What we can really pay attention to and choose is the shape of the frame.
Frame styling As mentioned above, your sports will be directly related to your frame selection, and the designer of sports frames will also design according to the scene.
☀ Alpine sports: trekking, expedition trekking, mountaineering, skiing
The environment of alpine sports often changes quickly, sometimes it becomes extreme. At this moment, high-quality equipment becomes very important. Those wrapping frames are designed for this purpose. The frames have side edges to prevent Light (including ultraviolet rays) penetrates from the side, and also blocks the infiltration of sand, air-conditioning, rain and snow at the same time.
At the same time, because in these high mountain activities, you almost always wear a helmet and a woolen hat, so a straight-handled mirror leg can make your head and ears more comfortable and easier to put on and take off.
Thoroughly straight handle.
⚑ Endurance racing sports: marathon, cross-country running, triathlon, mountain biking, cross-country skiing.
Lightweight is the demand for this type of sports, so their special frames must be slender and light-in order to let us forget its existence as soon as possible and focus on sports output.
The temples are thin and long, special for running and riding.
Secondly, the non-slip/adjustable design of the temples and nose bridge has also become necessary, which ensures that the sunglasses will not shake at high speeds or rough terrain, making the bridge of the nose and the base of the ears more comfortable.
Finally, imagine you run 10km with snow goggles? There is no doubt that the line of sight will be completely blocked by the fog. Therefore, for this kind of sweat-prone sport, the ventilation design of the frame is also very important. For example, its dedicated vents and large gaps are all to prevent fogging.
After talking about the frame, talk about the lens.
Sunglasses lenses are by no means as simple as dimming the light. A good sports sunglasses ultimately focuses on improving the wearer's sports performance. To do this, the sunglasses lens must first reach its passing line: blocking ultraviolet rays.
Basic task 1-block UV
Ultraviolet rays are harmful to the eyes, but invisible (purple light is not ultraviolet rays!), which means that we cannot test its UV resistance by directly wearing a pair of sunglasses. So what to do?
1Choose to trust the manufacturer and see if it has a description like "100% UV400 blocking" or "100% UVA & UVB blocking". The above two statements mean that this lens (at least claimed) can block 99.9% of ultraviolet rays. Of course, the CE certification mark must also be present.
2: Buy a UV pen, block it with sunglasses, and see if the UV watermark of the banknote can be photographed. return the goods.
Basic task 2-give the eyes a comfortable brightness
Our eyes don’t need any ultraviolet light, but we need visible light, and it’s just right. Sunglasses should not be too light or too dark.
The light transmittance parameter is often used to measure the basic performance of sunglasses. This is an international general standard. We can directly ask the seller "What is your light transmittance?" or "What is your light transmittance level?"
As shown in the figure, different light transmittances correspond to different scenes.
It can be seen that only high-altitude ice and snow environments can use Level 4 films. In addition, according to the official statement, Level 4 films are forbidden to be used in driving, because the car windshield plus Level 4 films = nothing can be seen.
Advanced task 1-color-changing lenses
Sunglasses with color-changing lenses (here refers to changing the depth of the color rather than the color itself), which can adjust the light transmittance according to various environments. If you need to stay outdoors all day, from early morning to dusk, from lonely deep forests to exposed ridges, and want a pair of sports sunglasses that do not need to be replaced, color-changing lenses are the best.
For color-changing lenses, we need to pay attention to:
The transmittance range of the lens, especially the upper transmittance limit, should be adapted to the strongest light situation of your activity.
The colder the environment, the slower the lens discoloration process, pay attention to the sudden exposure to strong light.
Expensive price
In addition, it is not the intensity of visible light, but the intensity of ultraviolet light, that affects the color change process of the color-changing lens. Therefore, in continuous cloudy and foggy days, due to the certain UV intensity, the color changing lens will be too dark. At this time, you can consider replacing the lens. For example, a certain outdoor sports sunglasses provides 3 lens solutions:
Advanced task 2-anti-glare
When you gently touch the beautiful scenery with your sight, the kind of light that suddenly flashes to your eyes is glare. The glare comes from various sunlight reflecting surfaces or direct light sources, such as the high beams of the opposite car when the car is wrong.
The most typical glare line of sight interference.
Glare is not easy to deal with. The low-light ability of sunglasses can indeed reduce the impact of glare, but after all, the glare is several orders of magnitude higher than normal brightness. If your activities often have this kind of glare, then you can consider polarized lenses.
The so-called polarized lens only accepts light from a specific incident direction (the principle of blinds), which greatly reduces the effect of glare and makes the line of sight more "clean".
Filter the scattered light, leaving only a specific direction.
Even in the case of 100% light transmittance, polarized lenses can also have a light reduction effect.
The disadvantages of polarized lenses are:
All kinds of glare are treated equally, which will cause the failure of those highlighted signs in your field of vision. Such as various outdoor reflective strips.
When looking at the LCD screen with polarized glasses, the LCD screen will be very dark, even to the point of being unusable. Before you buy, test it with your own mobile phone, car screen, etc., because not all screens are dark and the technology is different.
At the same time, there are anti-glare lens (coating), which is the kind of lens you can use to look in the mirror. It can further reduce the direct light from the front and relieve eye fatigue. Pay attention to the trade-off: the reflective coating is not scratch-resistant, and there will be imprints when rubbed against it.
More advanced anti-glare design should also include "anti-backlight coating"-when the sun is behind the head, part of the light will hit the back of the spectacle lens, and then reflected to the eyes, forming glare, disturbing the line of sight, anti-backlight coating It can eliminate this reflection and improve visual ability. If your lenses are lighter, this will have an additional look-up effect.
Special task-lens color
On a certain treasure, there are seven or eight kinds of lenses in a cycling glasses, which is not just a gimmick. The color of sports sunglasses lenses is not just for good looks, each color has its corresponding visual function.
The following is a list of the corresponding effects of various colors for you, but please note that these are only expert suggestions, do not underestimate our own eyes’ preference for colors.
Yellow or orange: The so-called "gloss-enhancing lenses" generally use these two colors and their variants. In principle, the yellow and orange lenses can maximize the contrast and make objects with different brightness and darkness more distinct.
In a series of weak sunlight environments such as cloudy, foggy, or mountainous, early morning and dusk, indoors, etc., yellow and orange lenses are your best choice for exercise.
Red, pink and rose colors: can also improve the contrast, but the degree is slightly lower than that of yellow and orange. This kind of color lens is more suitable for sunny or cloudy environments with strong sunlight
In addition, such colors can increase visual depth, that is, improve your ability to judge the distance of objects. Suitable for snow sports and road sports.
Copper, brown and dark amber: can block a lot of blue light, improve the sharpness of vision (the edge of the object is clearer) and contrast, especially when there are large green areas such as grass and forest in the line of sight, or when looking up at the blue sk
Green: Applicable regardless of whether the environment is light or dark. While improving the contrast to a certain extent, the colors in the line of sight are more balanced, the bright colors are not dazzling, and the dark colors are not dim. It has the best blur attenuation effect on the glare at the edge of the junction of light and dark, and it is best to watch the sunrise and sunset.
Blue or purple: Colored lenses can improve contrast, and blue and purple are no exception, but they are not prominent. In terms of improving sharpness, blue-violet is excellent, and the outline of the object becomes clear. At the same time, blue has the effect of calming spirits.
Various degrees of gray: perform the basic function of reducing the light transmittance, and at the same time, compared with the colorful lenses, the gray lens 100% retains the color of the object itself.
Overview
If your sports experience a variety of light environments, you can prepare lenses of multiple colors to provide the best vision solution. You can also see that there are multi-color and gradient designs on the market, which is also a good choice.
Extra tasks-anti-fog, oil-proof, ultra-light
As long as you are not buying swimming goggles or snow goggles, these are the last considerations. The anti-fog ability of sunglasses mainly comes from the ventilation ability of the frame design. The ventilation ability decreases, sports heat and sweat, and fogging is almost inevitable.
Some manufacturers use double-layer lenses, manual ventilation and other designs to ease the fogging. If you are really sensitive to anti-fog, pay attention to these visible anti-fog designs when buying.
Slightly better sports sunglasses will have an anti-fouling coating. The actual principle is the micro lotus leaf effect, which reduces the retention of liquid on the mirror surface, and plays a certain role in preventing oil and water. If possible, you can go to the physical store for actual measurement comparison.
The anti-oil and anti-fog functions often come from the coating, which is not conducive to maintenance. Image source: wikihow
As for the weight, resin sheets or nylon sheets are now basically universal. Although the visual performance is very different, they are basically ultra-light and not fragile. I don't think I need to pay special attention to this.
My nose is low and I am short-sighted, what should I do?
I have to admit that the environment in our market is still: high-quality sunglasses, especially suitable for high mountain environments. The frames are all designed by European and American designers. The nose frame of the frame is high and thin. Most Asians wear them. Well, it's easy to fall down during exercise. Faced with this situation, according to the author's personal experience, if you have already bought sunglasses, you can:
Get stuck with a hat or sweatband.
Buy a fixing rope for glasses. There are many styles on a certain treasure, and there are also high-quality imported ones.
Consider domestically-made designs or those with Asian plate types.
Buy the kind of mirror legs that are retracted, so that you can use the mirror legs to clamp your head, and it's acceptable for a personal test.
Pay attention to the sunglasses with nosepiece height adjustment design.
What should I do if I wear sports sunglasses for myopia? The answer is: prescription sunglasses, myopia clips, and sunglasses clips.
Image source: thingiverse.com
But if you have high myopia (greater than 600 degrees), you are not used to contact lenses, do not want to have surgery, and still want to worry about it, then several methods will not help you. Due to the problem of lens curvature, sports glasses will have imaging distortion after higher power, so general sports prescription lenses cannot be made too high.
Players with high myopia can try a set of glasses with anti-ultraviolet and strong light functions. The so-called set of glasses are glasses that are put on their heads with a belt. Their lenses are larger, and some are specifically designed to be compatible with glasses, such as , The goggles for ball games are typical glasses-compatible sets of glasses. When we are active in high-altitude areas and ice-snow areas, there are glasses-compatible snow goggles to choose from.
in conclusion
According to one's own sports scene, from the two aspects of the frame and the lens, you will find that it is the kingly way to prepare a few pairs of sports sunglasses.
