Why wear sunglasses?

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Sunglasses are a kind of glasses that can be used not only to play cool, but also to make use of its opacity so that you can look directly at everything from the surface. At the same time it is a kind of glasses that can block the sun’s rays. Sunglasses are also called sunglasses. It is a “labor” product that protects the eyes under strong light. Wearing this kind of lens can block ultraviolet rays and infrared rays, and the color of the external environment does not change. Only the light intensity changes, like a cloudy sky, it has a cool and comfortable feeling.
Strong sunlight contains a lot of ultraviolet and infrared rays, which may damage the cornea, lens, and even the fundus of the eye. Wearing a pair of sunglasses can block or absorb a part of the light and reduce the irritation to the eyes. In recent years, due to the importance of health, many people like to wear sunglasses when they go out in the hot summer to reduce the stimulation of the sun. Some people like to use it as a decoration. There are many kinds of sunglasses, which should be different according to different Need to choose.

Color sunglasses
Color sunglasses reduce the intensity of sunlight. Different coloring compounds are added to the glass to make sunglasses of different colors, and the wavelengths of light waves they absorb are also different.

Coated sunglasses
Coated sunglasses are coated with a thin film of metal on the glass lens that protects the eye by the reflection of sunlight from the lens.

Color-changing glasses
It is usually colorless and transparent indoors, and when exposed to sunlight, it quickly turns gray or other colors. The color of this type of glasses can automatically become darker or lighter depending on the strength of the sun. This is because a small amount of silver halide is added to the color-changing lens as a sensitizer, and a trace amount of copper is used as a sensitizer. This automatic adjustment of the light and dark lens can be ground into a lens with a degree of corrective vision, suitable for use in myopia and hyperopia patients. Unfortunately, its degree can’t exceed ±3 diopter (commonly known as 300 degrees), because the degree is larger, the thickness of the center and the edge are very different, and the difference in color of the glasses is greatly different.

Crystal lens
Can not block infrared and ultraviolet light. Color crystal lenses are not as good as glass lenses. Some people say that crystal lenses do not hurt the eyes, cool and eye-catching, this is unfounded. Humans have lived in the sun for a long time, and their eyes have adapted to the surrounding environment, and there is no need for protection in daily life. It is beneficial to work outdoors and wear a pair of sunglasses, but it should be selected according to the nature of the work and the environment. Use sunglasses as an ornament, regardless of the place, such as at dusk or even at night, to attend a party or a report, still wearing sunglasses, not only uncivilized and polite, but also increase the burden on the eyes, but not conducive to the health of the eyes.

Face matching
The right sunglasses are like the right shoes and bags, the best fashion statement. In the early 20th century, Hollywood star artists first wore sunglasses, to block the bright lights of the studio. Later, it became a must-have “weapon” to drive the trend of sunglasses. After the actor Tom Cruise wore Ray-Ban aviator sunglasses in the 1986 Top Gun, the sales of the sunglasses surged.

Face frame
Sunglasses are the focal point of the entire face, which effectively outlines the face, just like a thick waistband that highlights the skirt. What kind of face type, what kind of sunglasses should I wear? The following is the suggestion of optometrist Chen Huifen: Miu Miu ultra-thick plastic sunglasses play black and white, and the design of the temples is clear.
1. Elliptical face: with square, or smaller positive rectangular frame sunglasses. This face is the most pleasing, suitable for any kind of frame.
2. Round face type: With a larger lens, the rectangular frame is the best, and the contour is outlined.
3. Square face: with a round or oval frame, wide enough to be light enough.
4. Water chest face: with a one-piece frame.

Stylish sunglasses style

The most popular sunglasses are the plastic frames of oversized lenses. The lens is best to cover half of the face or the entire face. The lens is large enough to effectively block the sun to prevent ultraviolet radiation. Candy-colored plastic oversized frame sunglasses are the most star-studded models, and super fun!
The plastic frame provides more design space. Watch D&G’s color of the frame, play the crystal logo, and play the pattern. It is a test of the courage of the wearer.
Designer sunglasses are designed with the focus on the temples, and the plastic material makes the temples more fun to play, such as: enamel patterns, geometric patterns, black and white lines. Metal temples are decorated with artificial crystals and branded designs. Light-colored lenses are more pleasing than black lenses that are invisible, adding to the mystery of the wearer.

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