A good match can not be separated from accessories, of course, in summer, the most worthy of mention is sunglasses. In this quarter, both trendsetters and stars chose cat's eye sunglasses. A simple cat's eye sunglasses can enhance the three-dimensional sense of face shape and make your facial features full of tension. How can you miss it this quarter as a trendsetter?

The round face Gigi cleverly matches a full black cat's eye glasses in a black body, elongates the facial line, and is full of momentum in an instant.

Horsetail with a white edge cat eye glasses, cool girl both visual sense.

High waisted shorts + striped suit coat + flat triangle cat's eye glasses, how beautiful they are.

The cat's eye glasses with soft radian and a blue dress make you very fresh

Kendou, who is full of bright spots all over her body, burned her purse a while ago, but we should not neglect her cat's eyes. Oh, "tinted glasses" are also good!

Of course, white T is the best partner for black cat glasses.

Katy Perry, with her short hair cut, is more feminine. A pair of blue cat's eye glasses and a blue sports dress make her fresh and refreshing.

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One minute understanding of polarizers

Polarized light can be divided into three types: linear polarized light, elliptical polarized light and circular polarized light. Generally, the so-called polarized light refers to linear polarized light, also known as plane polarized light. The vibration of this kind of light wave is fixed in a specific direction, the propagation path in space is a sine curve, and the projection on the plane of vertical propagation direction is a straight line.

Principle: when the polarizing filter lens is filtered, it is filtered by the shutter structure of black crystal, and the remaining useful vertical light enters into the eyes, so as to block the reflected light, and feel comfortable and clear.

Usually, sunlight shines in all directions. When it hits an object, the light will reflect back to form two kinds of light, horizontal and vertical. Horizontal light will cause dazzled random reflection light. Polarized glasses can filter these reflected light. In fact, it is composed of seven layers of thin sheets.

Polarized light filter layer is made according to the polarization principle of light. Its material is composed of vertical molecules (the principle of louver), which can filter the dazzling reflected light and scattered light, and make the disordered light into parallel light into the eyes, thus having the function of eliminating glare, more effectively weakening the strong light and making the field of vision clearer.

There are too many light sources in life that will produce harmful light, especially sunlight. The light emitted from sunlight includes visible light, infrared light and ultraviolet light.

Polarizing sunglasses have the function of polarizing light, so they can block all harmful light without affecting the transmission of visible light, and can really achieve the function of eye protection.

Generally speaking, polarizers play the role of blinds, blocking the strong light so that people can see the object more clearly. You can wear polarizers in your daily life, whether it's sailing, outdoor activities or driving out at night.

In the summer with dazzling sunshine and frequent thunderstorms, remember to put a pair of polarized sunglasses in the car.

Polarized lenses are universally recognized as suitable for driving. When light is emitted from the surface of an object, it is partially polarized to produce glare. The reverse effect of glare: to enhance brightness and reduce color saturation; to blur the outline of the object and make the eyes tired and uncomfortable. The polarizer is made according to the polarization principle of light. It has the special function of effectively eliminating glare, filtering the disordered light, improving the driver's vision and increasing the driving pleasure.

The polarizing lenses are also classified, and the optical level is the highest level of the solar lenses. It requires that the "sphericity" and astigmatism of the lenses be "0". It also requires that the flat curvature conform to the European standard CE. The polarizing lenses can ensure that people who drive for a long time can maintain the best visual sense.

Classification of Polarized Sunglasses

Polarized sunglasses can be divided into:

Ski goggles

Fishing glasses

Polarized driving mirror

Outdoor sports mirror

Golf glasses

Because polarizers can block harmful light 100%, outdoor activities, such as skiing, fishing, water activities, etc., can completely block harmful light sunglasses to avoid glasses injury or fatigue.

How to distinguish polarized sunglasses?

1. A mobile phone with liquid crystal display, through the polarized sun lens to observe the liquid crystal screen, and rotate the screen at the same time, the liquid crystal screen seen will turn black with the rotation of the polarized sun lens, which is caused by the polarized sun lens filtering the light in the scattering direction from the screen.

2. In outdoor, the role of polarizers is obvious, which can be used to distinguish polarizing sunglasses from ordinary sunglasses.

Polarizing mirror test card, through the polarizing sunglasses, you can see the figure that the naked eye can't see. 

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About 2600 B.C

The emperor used a lens to shade and observe the stars

According to the Huangdi Neijing: "the emperor and his mother will be in the king's room, and they will cast 12 fire mirrors, which will be used with the moon. Then the mirror begins at Xuanyuan. "

According to Confucius, ancient Chinese used crystal glasses to treat eye diseases.

In 1000 BC

Yangsui (copper concave mirror) was excavated from the tomb of the Western Zhou Dynasty, No. 60, Zhouyuan, Fufeng, Shaanxi Province, which proves that the Chinese have mastered the theory of direct and refraction of light and used it to make mirrors and fire.

5th century BC

In Mozi, an ancient Chinese philosopher, he elaborated the theory that light radiates in a straight line and has reflection characteristics, which laid a theoretical foundation for the emergence of monocles in China.

Han dynasty

The world records a large number of scriptures and biographies, saying that it is difficult to recognize the small words on the fly head, so it naturally needs a kind of eye aid tool. The excavation of the magnifier with crystal inlaid in the gold ring of the Han tomb No.2 in Ganquan, Hanjiang, Jiangsu Province is an empirical study.

The diameter of the mirror is 1.3cm. It is inlaid in a gold ring with gold patterns. The weight of the mirror is 2.3g and the object is magnified 4-5 times. The size of the body, the exquisite selection of materials, and the exquisite decoration of the craft prove that the crystal convex lens can be processed and grinded in the Eastern Han Dynasty (the first half of the 1st century AD).

Jin Dynasty

Chinese people have used crystal to make optical lenses.

A magnifier made by a crystal master was unearthed in the Jin tomb in the northern suburb of Nanjing. It has a diameter of 2cm, a center thickness of 0.5cm, and can magnify objects 3-4 times.

Tang dynasty

In the heyday of feudal society, science and technology such as medicine and optics became more and more mature, and a large number of printed books and scriptures appeared, which provided objective conditions for the development of glasses.

It is said that Ju Zhishan, a great scholar in Tang Dynasty, once used round spectacles with handle.

Beining period

Shen Kuo discussed the theory of geometrical optics, concave mirror and convex mirror in Mengxi's pen talk, which further laid the foundation of optical theory in China.

Yuan dynasty

Marco Polo, a famous Italian tourist, saw Chinese people wearing glasses in the capital city of China in 1271. At this time, the glasses are likely to be two piece glasses with beam, frame, string and ear hook. Marco Polo introduced it to the west when he returned home. The first place to make a mirror was Venice, his hometown. In the west, it was at the end of the 13th century.

However, the person who introduced glasses from China to Europe is actually an Italian physicist in the 13th century. But it was almost a century before glasses were widely used there.

During this period, they struggled to solve a problem: how to wear glasses comfortably and for a long time? At first, things like today's magnifying glass were used to make frames on lenses made of transparent crystal stone, emerald, Amethyst and other minerals, and then they were fixed on handles or walking sticks. Later, they were tied to the chest with ropes, and gradually developed long handled glasses. Later, long handled binoculars and pincers appeared. They are especially suitable for Roman and English people with high bridge of nose. Voltaire, the great writer, praised in his works: "everything has its purpose, and everything is indispensable to achieve that purpose. Look at the nose for glasses! Because of it, we have glasses. "

It wasn't until the 16th century that the Spaniards tried to tie the ribbon to the outside of the frame and then put it safely over their ears that the problem was solved. It wasn't until 1730 that an Englishman discovered the head sized glasses, which soon became a double hook to ear style called "Sunglasses" by France, and happily claimed that this style could let people breathe freely.

When spectacles were first introduced into England, priests criticized that "an attempt to restore failing eyesight with spectacles is a malicious provocation against a merciful God." But the reputation of spectacles has not diminished, perhaps thanks to a cartoonist, William hogas pantran. This poor Italian humorous old man often draws glasses in his satirical paintings in order to attack his glasses. In fact, glasses are more popular.

In Spain, however, the opposite is true. In 1612, a Milanese pointed out in a book that Spain "welcomes glasses from all walks of life, because they think that wearing them will make you more calm and important.". Several years after the book was published, a French lady who visited Madrid wrote: "in Spain, when someone's wealth increases, he increases his glasses."

It wasn't until 1784 that Benjamin Franklin of the United States invented the bifocal glasses, which improved their reputation. As for invisible glasses, they were made by Germans in 1887.

These are the development history of early foreign glasses

Late Ming and early Qing Dynasty

Sun Yunqiu (1626-1661), an optical instrument manufacturer, pioneered the optometry method of "mirror to mirror with eyes", expanding the perspective glasses into 72 kinds of mirror methods, using the convex concave mirror refraction principle, according to people's age and different eyesight, developed various kinds of lenses with different luminosity, such as old flower, little flower, farsightedness and myopia, and invented the "tractor" grinding lens, creating the farsightedness mirror, water mirror, end volume mirror, incense mirror and photography Light mirror, sunset mirror, microscope, wanhuajing, and the history of mirrors.

After the founding of the people's Republic of China

With the rapid development of China's spectacle industry, the spectacle frame has gradually shifted to non-metallic frame (celluloid, plastic, plate, etc.). 

After the reform and opening up

The glasses are of various styles and various brands are born according to the requirements. The double piece curved leg glasses have developed to a new height.

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Looking forward to two months, the child finally started school, and finally had free time. My friend suggested to go out and drink fruit tea. In such a hot weather, I really didn't want to run out. If I wanted to drink it, I'd better make it at home. that there are a lot of fruits at home. It's important that I make it clean and sanitary at home.

Fruit tea is generally arranged at will according to seasonal fruits. Fruit tea in cold drink shops will be mostly matched with strawberries or red heart pitaya, which looks a little pink and attractive in appearance. However, there are no strawberries and red heart pitaya in the family, so we can only make them with the existing fruits in the family. Fruit tea is very simple, as long as the tea bubble, put in the fruit can be. The ingredients for making fruit tea include: 1 / 4 pineapple, 1 orange, 1 mango, 1 lemon, 1 passion fruit, a proper amount of honey, and a proper amount of salt (for washing fruit).

Step 1: prepare the fruits of the season. I have prepared 5 kinds of fruits. In summer, the fruits are cheaper. This plan will cost 3 yuan. Make your own fruit tea with good fruit.

Step 2: put the rose petals into the tea bag, pour in some boiling water and soak for about 20 minutes. Rose has beauty and beauty, improve the beauty of the benefits, often drink rose tea for female friends is a good way of conditioning.

Step 3: cut pineapple into small pieces, peel and core mango to cut out pulp, wash orange and lemon skin with salt respectively, cut into thin pieces, pick out those with nuts with toothpick.

Step 4: take out the tea bag after the rose tea is made. Don't throw the tea bag first, but you can make it again.

Step 5: put the fruit block and the thyme pulp into the teapot for a while, so that the fruit and the tea mix together to produce the fragrance. Put the teapot in the refrigerator for 1 hour. If you want to drink it at room temperature, you don't need to put it in the refrigerator.

Step 6: add some honey to taste sweet. The taste of the fruit tea is sour, sour and sweet, which is much better than the milk tea. It's better to drink the iced tea to relieve the summer heat. Our family are very fond of drinking fruit tea, which can not only supplement water, but also vitamin C.

It's hot. Make a fruit tea at home. It's good for moisturizing, beautifying, looking and drinking.

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Tea contains a lot of biochemical ingredients, which can keep you healthy. Tea can refresh the mind and decompose fat, remove greasy, detoxify and stimulate body fluid to quench thirst, and reduce the risk of cancer and cardiovascular and cerebrovascular diseases.

What are the benefits of drinking tea?

1. Cardiovascular protection

Tea polyphenols contained in tea can improve the metabolism rate of fat. When the content of triglyceride and cholesterol is too high, it will slowly deposit on the blood vessel wall, thus forming atherosclerotic plaque and increasing the risk of cardiovascular disease. Catechins and oxidants in tea polyphenols can inhibit plaque proliferation, decrease fibrinogen activity and blood viscosity, reduce coagulation factors and inhibit atherosclerosis.

2. Can prevent radiation

Tea polyphenols and oxidation products in tea can absorb some heavy metals and prevent the body from being hurt by heavy metals. The extract of tea can alleviate the discomfort caused by radiotherapy and prevent the decrease of blood cells.

3. Can delay aging

Tea polyphenols have strong antioxidant activity, which can clear away the harmful free radicals. The antioxidant capacity of tea polyphenols is 18 times higher than that of vitamin E, which can block lipid peroxidation and help eliminate active enzymes. It has the effect of delaying aging and prolonging life.

4. Can fight cancer and prevent cancer

Tea polyphenols can block the synthesis of carcinogens in the body, such as nitrosamines. In addition, it can kill some cancer cells and improve the resistance and immunity. Tea contains catechins that reduce the risk of colorectal cancer and stomach cancer.

5. Protect the gastrointestinal tract

Polyphenols can coagulate and precipitate a large number of proteins, protect the intestinal tract and enhance the defense ability. In addition, it can also combine with bacteria in single cell, kill E. coli and typhoid bacillus, etc. Grind proper amount of green tea into fine powder and take it with boiling water, it can help to treat enteritis and bacillary dysentery.

6. Can lose weight

Tea contains a lot of folic acid, catechins and caffeine, which can inhibit obesity. Oolong tea can decompose fat, relieve greasiness and promote food digestion. Drinking a cup of Pu'er tea every morning and evening can reduce blood pressure and blood lipid.

reminder

Don't drink strong tea for a long time to avoid accelerating calcium loss. Fresh tea contains some non oxidized polyphenols and alcohols, which will stimulate gastrointestinal mucosa and induce gastric diseases. It contains caffeine and active alkaloids, which can excite the central nervous system. It is also necessary to control the amount of caffeine for people with cardiovascular and cerebrovascular diseases and neurasthenia. You can't drink it four hours before sleep. 

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