Skiing, there is a set of professional equipment to protect you from cold, heat preservation, waterproof, anti-fall and so on. In addition to pulling wind ski suits,
Ski boots, helmets, gloves, and ski poles are not a key piece of equipment – goggles. Its most important function is to -------- light protection, or more accurately, to prevent snow blindness. Many people may not know much about ski goggles, this article will introduce you to ski goggles and their purchase criteria in detail, let's take a look at it.
What are ski goggles?
Ski goggles are glasses used to protect the eyes when skiing, in simple terms, ski goggles are also divided into ordinary snowboard and snowboard ski goggles and snowboard snow goggles.
What is snow blindness?
Snow blindness, also known as electro-optic ophthalmia and ultraviolet ophthalmia, is an eye injury caused by excessive ultraviolet radiation. Ultraviolet rays in sunlight can darken and age the skin. But the skin is good and there is also the shielding and protection of clothes, and you can also use sunscreen to "protect the body"
The eyes are not so lucky, and can only face the sun's rays head-on. In normal circumstances, the light seen by the eye comes from the reflection of objects such as the ground and buildings, and the average reflectivity is 10% to 35%.
After reflection, the intensity of sunlight will be greatly weakened, generally will not cause damage to the eyes.
But the snow is different, the snow is made of ice crystals, like countless small mirrors, very reflective, the snow field is empty, lack of shelter
It can't weaken the sunlight, and the reflectivity can be as high as 95%, which is why after heavy snow we feel very bright outside.
Therefore, if the skier does not protect the eyes well, in the snow field, it is basically equivalent to looking directly at the sun, excessive ultraviolet rays into the eyes, will burn the cornea and conjunctival epithelium, there are eyelid redness and swelling, eye pain, photophobia, tears, can not open the eyes, blurred vision and other symptoms.
Ski goggles standard - keep in mind the "four defenses and three cans"
A good pair of snow mirrors must meet seven conditions, which are:
Windproof: Prevents cold winds from irritating the eyes
UV Protection: Prevents UV rays from burning the eyes
Anti-fog: The mirror surface cannot fog
Shock Resistant: Ski goggles should not cause damage to the face, especially the eyes, after a fall.
Wearable: Fits helmet/hat
Device: Can you put down the glasses (myopic people pay attention)
Wide angle: See as much of the side as possible without being blocked by the goggles
All in all, the prevention of snow blindness, the main measure is to correctly choose glasses, the color of ski glasses, is designed for different weather conditions, the basic point is that when the light is strong, the color of the lenses is dark, which can better block the light. When the light is weak, the lens is lighter in color to keep the field of vision clear. For ordinary people, the selection of ski glasses should pay attention to the standard of "four defenses and three can be".
Guangzhou Bangshidu Glasses Co., Ltd., founded in 2006, has a complete medical isolation eye mask, medical isolation mask and medical goggles medical device filing qualification and independent export qualification, is a complete four ISO quality management system certification, as well as intellectual property standard compliance system and SEDEX international certification system enterprises, with 56 independent patent rights. It undertakes the joint scientific research project of the key technology of the provincial medical isolation eye mask "card neck", as well as the formulation of the national standard for medical goggles and the provincial group standard that the country urgently needs. With quality, focus on eye protection for 15 years, with scientific and technological innovation and good service to stand in the market, Bangsdu has now built an innovation-driven brand with certain regional and international influence - China's own national brand.
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This article is from the Guangzhou Bangshidu eye lens number, reproduced please indicate: The article is from the Guangzhou Bangsdu eye lens number