How to distinguish the quality of Sunglasses

Judging the advantages and disadvantages of Sunglasses can be examined from both quality and aesthetics.Aesthetic has personal factors, and quality is standard.The quality of Sunglasses mainly refers to the quality of the lens.At present, the world's general standards are the standards of the US Food and medicine and Health Inspection (F D A) standard.

1. According to the F D A standard, while the lens guarantees the light transmission rate, it is necessary to filter more than 90 % of the ultraviolet rays in the sun, and the lens should be labeled "UV-100protct10n"."UV-400protct10n" tag, so it is very important to check the UV tag on the lens.

2. The lens must not have the "degree" of optical lenses.Generally, if the refractiveness exceeds 15 %, it will feel dizzy when wearing.

3. The lens must have a high strength and pass the impact test.Generally speaking, the strength of plastic film (propionic acid or acetate), resin tablets, and glass tablets from small to large.

How to distinguish the quality of Sunglasses lens quality

1,Material of the lens

glass lens: wear resistance, but relatively speaking, its weight is heavier than other materials, and it is also easy to break.

Popular resin lens: This kind of lens is lighter than glass lenses, impact resistance, and is not easy to break, but the hardness is low, so it is easy to get hair and it is easier to have scratches.

2. The refractive index of the lens

The higher the refractive index, the thinner the lens, the higher the price.Such as the optical characteristics of the lens:SunglassesIt is a flat -light mirror, which cannot be littering, and should not have optical defects that affect vision.

The simple method of identification is to place the Sunglasses in front of the eyes and observe the distant targets through the lens, such as window frames or door frames, and then move the glasses up, down, back and forth, the target should not be swinged and wavy deformation.

3. The color of the lens

Sunglasses are divided into dark and light colors without color distortion.The choice of the color shades of the lens should be depends on the places of the required activity. Selecting different colors for different light sources and different use occasions, the color of the lens will affect the Shading effect.To enable Sunglasses to effectively block the strong light in summer, dark Sunglasses are needed, but if you wear a bike or drive, you should not choose a lens with darker colors.In addition, when Sunglasses are used for daily driving, they also need to have the ability to identify different color signal Lights.

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1. The difference between myopia swimming coating and non -coating

1. From the perspective of appearance, there is a layer of colorful and six -color film on the outside of the coating swimming mirror. Like wearing Sunglasses, others cannot see your eyes, and not coating myopia swimming mirrors are transparent.

2. Iopathy swimming mirror coating can effectively avoid strong sunlight and ultraviolet light. It is especially suitable for Outdoor use. However, if the myopia swimming mirror does not coil, there is no sunscreen isolation effect, which is more suitable for indoor water.

3. Aopia swimming mirror cover can reduce the refraction light of the surface layer of the optical lens, reduce the glory of mirror glass, and see more clearly in the water than the unplastic myopia swimming mirror.

two,The myopia swimage coating is better or not coated

I am myopia swimming goggles have a lot of knowledge. What myopia swimming mirror is still depends on personal needs.If it is used in the indoor constant temperature swimming pool, non -coating myopia goggles are enough.The coated myopia goggles are more suitable for wearing outdoors. It can larger the ultraviolet rays, and it looks cooler and professional on the surface.

Third, why myopia swimming mirror is coated

The light transmission rate of the lens itself is only about 91%, and some light will be reflected by two surfaces of the lens.The coating lens is a new technology that uses optical film and vacuum to put a certain thickness single -layer or multi -layer optical film to enable the lens to obtain some new and original excellent performance. Enhance or reduce the effect of light to increase the light transmission rate of the lens to 98%.

The main advantages after lens coating are: coating glasses can reduce the reflection light on the surface of the lens, clear vision, reduce mirror reflex light, increase the transmission rate of light, and solve the problem of wearing glasses in strong light. It also increases beauty. Essence

[Ski mirror color] How to choose a Ski -view population for skiing glasses color

Selection of Ski glasses color

In the outdoor activities, especially the high -ultraviolet plateau, white ski resorts, and dazzling places, many donkey friends use Ski Outdoor glasses to cover the dazzling light to reduce the fatigue or strong light stimulation caused by eye adjustment.harm.So, what are the characteristics or differences between different mirror -colored Outdoor glasses?

1. The gray film is a neutral color system that can balance any chromatography. Although the viewing scene will become darker, there will be no obvious color difference, which can show the real and natural feeling.Suitable for outdoor activities who like to tourism and photography.

2. The blue gray lens is similar to the gray lens, and it is also a neutral lens, but the color is slightly darker, and the visible light absorption rate is higher.If the light of outdoor activities is particularly strong, you can consider wearing blue -gray eyes.

3. The surface of the mercury lens lens adopts high -density mirror coating.Such lenses can absorb reflex visible light, suitable for long -term Outdoor sportsmen.

4. Tea -colored lens filtering a large amount of blue light, to a certain extent, it can improve visual clarity and contrast.If the environmental air pollution is severe or fog, the visual effect of wearing tea -colored Outdoor glasses is better.

5. In addition to absorbing some light, green lenses can maximize the green light of the eyes, so it has a cool and comfortable feeling, suitable for donkey friends who are easy to fatigue.

6. The yellow lens is almost reduced to visible light, but at the fog and dusk, it can improve the contrast and provide more accurate images, so it is called a night vision mirror by a donkey friend.Some young people also wear yellow lens "Sunglasses" as decorative.

7. Other mirror colors such as light blue, light pink, etc., are more decorated than practicality, so I won't go into details here.

How to buy skiing mirrors in myopia

1. Wear a Ski mirror after wearing Contact lenses

Advantages: affordable.Save time and effort.

The price of Contact lenses is relatively low. It is recommended that during skiing, we choose daily throw high -transparent oxygen Contact lenses. It does not need to be cleaned and easy to wear.Of course, it is not suitable for wearing Contact lenses for eye redness, swelling, soda, and inflammation.

Disadvantages: poor sanitary conditions and insufficient safety.eyes are easy to swell.

During skiing, the weather is often gloomy and windy.Wearing Contact lenses is easy to dirty, it is not convenient to clean and replace, and the Contact lenses are worn inside the snow mirror, affecting the oxygen permeability of the eyes, which can easily cause redness and swelling of the eyes, and severely cause inflammation.When the high -strength exercise or falls, the eyes will bear a certain pressure, and the invisible eyes can be easily pressed out. At this time, can the invisible lenses be worn back, can it be found?Can I clean it?These are hidden dangers.If the Contact lenses are broken in the eyes, it will be even more incapable.

2. Wearing a Ski mirror that can directly "card" Myopia glasses

Advantages: Choose a Ski mirror that is relatively large internal space and directly buckle on Myopia glasses.This is a fairly affordable and effective way.

Disadvantages: The requirements for snow mirrors and Myopia glasses are relatively high, and the center point of myopia lenses is not easy to wear poorly wearing comfort on the pupils.

The Ski mirror that can directly "card" Myopia glasses is relatively high in snow mirror. It is mainly designed on the frame and increases production costs.The position of the temples on the left and right sides of the frame generally opens the groove to facilitate the mirror leg of Myopia glasses.Although this kind of snow mirror has large internal space, it is not suitable for all Myopia glasses. Generally, we recommend wearing: memory or TR90 material, good mirror leg flexibility glasses, and myopic glasses use anti -fog lenses. People with small frames are used.This method.

Xiaobian concluded: skiing is a dangerous and exciting sport.When the snow season is approaching, it is the longing for everyone who likes sports in the snow field.Everyone knows that during skiing, we need to choose Ski mirrors to protect our eyes.For myopia how to choose Ski glasses, the editor has answered specific above. I hope everyone can protect their personal health while leisure and entertainment.

1. What is polarizing mirror

The polarizing mirror is a lens manufactured based on the polarization principle of the light. It is used to eliminate and filter the scattered light in the beam, so that the light can put the eye visual image in the light transmittance of the right track, making the field of view clear and natural.Mostly used for Sunglasses and camera lenses.

Second, the principle of polarizing mirror

The role of polarizing mirror is to filter reflective light and increase imaging contrast.Its working principle is to selectively filter light from a certain direction.By filtering the many biased Lights in the long reflection, weaken the intensity of light in the sky, darke the sky, and increase the contrast between the blue sky and the white clouds.When you shoot the specific real shooting, you should look at the viewfinder and rotate the front mirror. The darkest effect in the sky in the viewfinder is the most obvious, and the darkest is 90 degrees.You can transfer to any angle of the darkest and the brightest rooms as needed.

Polarized mirror can also effectively weaken or eliminate non -metallic surface reflection. This reflection light is a typical polarizing light (the light reflected by the metal surface reflection is not polarized light, and the Polarized mirror does not work on it). By adjusting the polarizer, you can filter it by adjusting the polarizer.The reflection of this part is dropped, thereby improving the image quality of the subject and improving the clarity of the picture.

For example, by using polarizers, the reflection of the water surface can be weakened to clearly shoot the fish in the water.When shooting such a scene, the projection angle of the light source should be consistent with the angle of the camera, and its maximum partial angle needs to be agreed between 30 and 40 degrees.When using it, you can adjust the lens in the front group of the filter to minimize the reflection on the surface of the scene.In addition, polarizing mirrors can effectively improve the saturation of color and increase contrast. This is because polarizing mirrors can absorb various directions reflected by fog or dust reflected in the atmosphere, so that the shooting images are more pure.

For example, in photography such as flowers and static objects, polarizers are often used to take colorful photos.It is useful when landscape photography, flower photography and shooting certain specific reflective scenes.The polarizer is used in the landscape photo, and the depiction of the cloud layer has excellent effects.The light refractive index of the blue sky is greater than the light scattered by the white clouds.Using polarizer can also make the color of green leaves more saturated and eliminate the fog of shooting urban scenery at low angles.

3. Polarized Sunglasses buying skills

Sun glasses are not only used in summer, but they must be used all year round.Wear it on a sunny day, and it should be worn on a cloudy day.Do nt think that the sun is not strong and the weather is not hot, so it s light -hearted, and unknowingly illuminated more harmful ultraviolet rays.

1. First consider quality

The primary function of polarizing Sunglasses is to prevent ultraviolet rays and filtrate polarized light. Good polarized Sunglasses lenses can block more than 90%of ultraviolet rays.You can choose to have polarized Sunglasses with the best blocking ultraviolet logo with the "UV400"; inferior polarized Sunglasses, such as dark Sunglasses. As the light of the human eye darkens, the pupils of the human eye will become larger, and the eyes of human eyes will become larger.increase, increase damage to the eyes.

2. The truth and nature of the vision

The color selection of polarized Sunglasses should be based on the color of the surrounding environment, the edges of the object are clear, and the principle of effectively identifying different color signal Lights.Especially when driving Sunglasses, it is guaranteed to drive safety.The color of the lens is better in gray, tea, and green, because these colors of lenses are better absorbed by infrared and ultraviolet rays, which can improve visual contrast and clarity. Wearing effects in severe air pollution or fog.

3. Will there be discomfort for a long time?

Genuine polarized Sunglasses must be comfortable to wear; inferior lenses have no technical and functional at all when manufacturing, and the lens materials are also very inferior. After wearing it, feel uncomfortable, dizziness, headache, dry eyes, tingling, etc. should be stopped immediately.Essence

4. Look at the protection function of the frame

Most polarized motion Sunglasses frames are designed with veneer arcs, which can effectively prevent wind and foreign bodies from stimulating the eyes in outdoor sports.In addition, the hard level of polarizing lens and the flexibility of the frame of the frame consider whether it will hurt the human body.

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What is lens refractive index

The lens refractive index is the ratio of the speed of lighting in real vacuum to the spread of light in the lens material, which reflects the lens's refractive ability to light.

At present, mainstream resin lenses on the market are: 1.56, 1.60, 1.67, 1.71, 1.74 and other types.Under the same prerequisite, the higher the refractive index of the lens, the thinner the lens, the lighter.

Speaking of this, many friends are very happy, of course, I hope that they can be equipped with a light and thin glasses!But don't ignore another problem: Generally, the higher the refractive index of the lens, the lower the number of Abbe, and the more obvious the color scattered.Because the scattering will affect the imaging effect of the medium, we measure the imaging quality of the lens through Abei.The higher the number of Abe, the smaller the color scattered, the clearer visual effect.Abe's number is too low, which will make the lens a rainbow pattern, affecting the user's visual clarity.

Therefore, the higher the refractive index is better, the better the lens refractive index must be selected to better protect the eyes.

What is the refractive index of polarized lens

The refractive index of polarizing lenses is not high. Generally, the refractive index of the selection of myopia below 500 degrees is 1.56. If you need to consider the thickness of the glasses, you can also choose the refractive index of 1.60 and above.The price of polarized lenses with higher refractive indexes such as 1.71, 1.74 is also higher, and you need to customize it. You can choose according to your own needs.

Generally speaking, polarizing glasses do not need to be worn all the time, and mostly use it during outdoor sports, so the ordinary 1.56 refractive index can meet most of the requirements.

The benefits of high lens refractive index

1. For people with a height, wearing thick lenses all day not only easily cause visual fatigue, but also easily cause compression or cause the glasses to decline or pain in the ears.The high refractive index lens refractive index will be relatively thin and lighter, and it is usually relatively comfortable to wear.

2. Too thick lenses will not only make the wearer have a sense of depression, but also affect the aesthetics of the wearer. The relatively thin lens will look better.

3. Compared with low refractive lenses, high refractive lenses are better than lenses with low refractive indexes than lenses with lower refractive indexes.

How to choose the right lens refractive index

1. Patients with myopia below 200 degrees are recommended to use a 1.50 refractive lens.

2. Patients with myopia below 600 degrees are recommended to use a 1.56 refractive index lens.

3. Patients with myopia below 800 degrees are recommended to use a 1.60 refractive index lens.

4. Patients with myopia below 1000 degrees are recommended to use a 1.67 refractive index lens.

5. Patients with myopia below 1000 degrees are recommended to use a 1.74 refractive lens.

Disclaimer: The above method stems from the index of the program system or the sharing of netizens. It is for your reference only and does not represent the research perspective of this website. It proves that it is valid. Please pay attention to the authenticity and authority of the source of the content of the content.Apply to delete & gt; & gt; error correction & gt; & gt;