The principle and function of anti-UV glasses
What are UV protection glasses? The principle and function of anti-UV glasses? The price of anti-UV glasses?
What are UV protection glasses?
UV glasses are just sunglasses, but they protect against UV rays.
What style is suitable for what face shape?
Round faces: Straight or angular frames are needed to soften your contours and make your face look more defined.
Oval shape: It is very suitable for any style, just pay attention to the size and proportion.
Rectangular type: Suitable for wearing large frames, which can make up for the shortcomings of a long face and make the face look more delicate. The color is mainly dark.
Square face: Just the opposite of round face, you need some rounded corners and streamlined frames to set off your unruly and extraordinary temperament.
Triangular shape: Try to avoid using large frames or square frames, because this will make the face look wider at the top and narrower at the bottom. It is better to use thin frames, round frames, and bright colors.
Generally speaking, brown ones have strong UV protection and are more popular.
The principle and function of anti-UV glasses
There are three types of light emitted from the sun: visible light, infrared rays, and ultraviolet rays. Among them, ultraviolet rays cause serious damage to human skin, eyes, etc.; the light released by sunlight is above IR (Infra-red) infrared ray (750mm) and visible light (Visible light lay) (310~780nm) ; Ultraviolet rays are divided into UVA, UVB, UVC (310nm) and above, blue light (Blue light). UVA, UVB, and UVC are harmful rays. If exposed to the sun for a long time, they will cause damage to the body. UVB has a serious impact on vision. ( Tanning Ray) is a ray that burns the skin. Most of the corners of the eyes will absorb this UVB ray, so this light source must be blocked. Because polarized sunglasses have the function of polarizing light, they can block all harmful rays without affecting the transmission of visible light, and can truly protect the eyes.
Natural light (non-polarized light) is actually composed of electromagnetic waves that vibrate in specific directions, and the reflected or scattered light usually prefers a specific direction. This is why polarized sunglasses can filter out reflections from car roofs or pools. Because of the sunlight coming in; after natural light is filtered by polarized lenses, it can only allow light in one direction to pass through. That is to say, polarized lenses can polarize the light first and only allow light in one direction to pass through (visible light). ). Polarized sunglasses use this feature to block harmful light, because sunlight will produce harmful glare due to natural reflection or refraction no matter it touches any object. Polarized sunglasses can completely absorb these strong lights that can cause dazzling and eye damage.
This article is excerpted from [China UV Fabric Network www.texuv.com]. Please indicate when reprinting.
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