After the cold winter passed, everything recovered. Spring brings us the first ray of new weather. In fact, we can get many benefits from sunlight, but sunlight can also bring us some serious health problems. If you are driving on flat water or flat roads, glare will occur. Glare is not only dazzling, but it can also have long-term effects on your vision, such as cataracts in severe cases. The glare from the sun can even burn your eyes. Fortunately, a good pair of sunglasses can help you resist harsh sunlight and protect your eyes.
Wearing sunglasses is the most direct and effective way to protect your eyes, but there is usually a lot of wrong information about sunglasses and how to deflect ultraviolet rays. So let us discover some common misconceptions about UV damage and sunglasses, and explain why they are an important part of personal protection, not just a fashion statement.
Polarized lenses are better than ordinary sunglasses?
When we buy sunglasses, maybe the salesperson will tell us that these sunglasses are polarized, so they are more expensive. They will definitely say that polarized sunglasses are better than ordinary sunglasses.
In fact, this view is very one-sided. Polarized glasses are like blinds. The lens only allows light in a certain direction to pass through, so it can filter out a part of glare, astigmatism and stray light, so that the light becomes soft, and it can directly reduce glare, so that we can see objects more clearly and realistically , And make the field of vision clearer. Therefore, polarized glasses can be better used when driving, fishing, cycling, skiing, etc. It is undeniable that in this respect, polarized sunglasses are indeed better than ordinary sunglasses.
However, polarized sunglasses also have limitations:
In other words, after wearing polarized sunglasses, you may not see the LCD screen of some devices in the car. If you happen to have a pair of polarized sunglasses in your hand, you can simply do a little experiment, that is, place the phone screen horizontally, and then put on the polarized sunglasses. At this time, you can't see anything on the screen. For this reason, pilots cannot wear polarized sunglasses to fly airplanes.
Advantages of polarized sunglasses
• By eliminating glare, your eyes can see the bright light and reflective objects in the water more comfortably
• Enhance clarity and visual contrast
• More suitable for water sports
• Reduce eye fatigue
• Built-in UV protection
Advantages of non-polarized sunglasses
• Relatively cheaper
• Easy to view LCD screen
• Objects such as white surfaces are more realistic to colors
• More durable than treated lenses
Darker colored sunglasses are better than lighter colored sunglasses?
You might think that sunglasses with dark lenses are definitely better than light-colored sunglasses. Of course not, this view is wrong. The shadow of the lens has nothing to do with the ability to prevent ultraviolet rays. The specially treated lens can achieve the UV400 anti-ultraviolet effect even if there is no color. Some counterfeit and shoddy sunglasses, even if the lenses are very dark, cannot prevent ultraviolet rays. Therefore, it is not to say that the darker the lens, the better the protection effect.
The relationship between lens color depth and its function:
The darker the sunglasses, the more visible light they absorb. Generally, dark-colored sunglasses can absorb more than 75% of visible light, while some light-colored lenses may absorb less than 50% of visible light.
Can all sunglasses block ultraviolet rays?
No, of course not! If you think so, then you are wrong. In fact, not all sunglasses are "sunglasses", and not all sunglasses have UV protection. For some marketing methods, many glasses are directly labeled as "sunglasses", but actually they do not have any function for refracting ultraviolet rays. Maybe it's just a pair of colored glasses.
Generally, there are three types of ultraviolet rays: UVA, UVB and UVC.
UVA has a strong penetrating power, UVA can directly reach the dermis of the skin, and can destroy the fine structure of the skin, resulting in wrinkles and fine lines. The skin is lagging and aging. This is called photoaging in medicine.
UVB has medium penetration. Most of the UVB contained in sunlight is absorbed by the ozone layer. Less than 2% of the UV rays can reach the surface of the earth, and the damage of UVB to the eyes will gradually accumulate. In addition to treatable acute keratitis, other common damages, such as cataracts, retinal macular degeneration, and pterygoid (flesh (also called pan-flesh)), are all permanent damage. Once the damage is caused, vision and life will be lost. Cover the "shadow."
UVC has the weakest penetration ability. But short-wave ultraviolet rays are very harmful to the human body. Short-term contact can burn the skin, and long-term or high-intensity contact can also cause skin cancer. Still need to pay attention.
What is the difference in lens color?
The color of the lens affects the degree of eye protection. Although some colors have certain benefits, the degree of protection they provide will vary.
• Pink lenses can reduce eye fatigue, improve visual depth and provide maximum contrast. However, they cannot provide the same light protection as dark-shaded lenses.
• For lower light levels, green lenses provide good contrast, dim glare and uniform color perception.
• Blue lenses also have a unique and beautiful appearance, which can also enhance color perception and define contours.
• Yellow lens, because it hardly reduces visible light, can be used in low light conditions, can increase contrast and provide more accurate vision, so it is also called "night vision goggles", of course, can also be used for decoration.
• The brown and amber lenses contain red elements to help improve depth perception.
• Black lenses can provide the highest light reduction and minimize glare, especially underwater.
A good pair of sunglasses must have the following four functions:
1. Prevent the exposure of ultraviolet rays in sunlight;
Ultraviolet rays can damage the cornea and retina, and high-quality sunglasses can completely eliminate ultraviolet rays.
2. Prevent the exposure of strong light;
When the eye receives too much light, it will naturally shrink the iris. Once the iris shrinks to its limit, people then need to squint. If there is still too much light, such as sunlight reflected from snow, it will damage the retina. High-quality sunglasses can filter out up to 97% of the light that enters the eye to avoid damage.
3. Prevent glare from being exposed;
Certain surfaces, such as water, can reflect a lot of light, and the bright spots produced in this way can disturb the line of sight or hide objects. High-quality sunglasses can completely eliminate this kind of glare by using polarizing technology.
4. Eliminate light of specific frequency;
Certain frequencies of light will blur the line of sight, while other frequencies of light can enhance contrast. Choose the right color for the sunglasses, so that it can get better results in a specific environment.
Finally, ANRRI's small tips：
If sunglasses do not provide UV protection, they will expose you to more UV rays. Cheap sunglasses filter out some of the light, causing your iris to open up to receive more light. This will also allow more ultraviolet rays to enter, increasing the damage caused by ultraviolet rays to the retina. Therefore, there is indeed a difference between various sunglasses. For a specific use environment, choosing suitable and high-quality sunglasses will provide you with the greatest protection.
Of course, different groups of people will choose sunglasses according to their personal preferences and uses, but we must remember that the most fundamental thing is to start with the basic principles of ensuring eye safety and unaffected vision. Reducing strong light stimulation, clear and comfortable vision and UV protection should be the basic functions of sunglasses. Therefore, when choosing sunglasses, you can't just focus on style and ignore its inherent qualities. This is one of the reasons why ANRRI comes into contact with sunglasses. In order to give our customers a better experience and healthy eyes. ANRRI has been working hard and making continuous progress.