Views: 135 Author: Site Editor Publish Time: 2020-12-22 Origin: Site
In the previous article, we learned about different types and sunglasses and how to choose presbyopic glasses,do you remember? This week we will introduce you how to choose polarized reading sunglasses, let us understand photochromic polarized sunglasses together.
Although polarized lenses can filter out a lot of irregular light interference and avoid the occurrence of glare and other phenomena, if the arc bend of the lens itself cannot be in the optical standard refractive state, the polarization effect is weakened, affecting the authenticity of the image, and the durability is poor.The general polarized sunglasses on the market are made of fiber sandwiched polarizing film. It is different from optical glass polarized sunglasses, because of its soft texture and unstable arc bending. After the lens is assembled to the frame, it is difficult for the lens to meet the optical refractive standard, and the image is loose and deformed.
Polarized lenses are pressed and synthesized from multiple layers of thin resin materials. Each layer has different functions. The middlemost layer is the polarizing layer, which can filter out the stray reflected light. The second and third layers can filter 99.9% of harmful ultraviolet rays and reduce the light intensity. Their functions are no different from ordinary sunglasses. The fourth and fifth layers of polarized lenses are anti-impact layers, so that the lenses are not easy to break; the sixth and seventh layers are strengthened to make the lenses difficult to wear. Polarizers can filter out harmful light and protect your eyes.
The primary function of polarized sunglasses is to prevent ultraviolet rays and filter polarized light. Good polarized sunglasses lenses can block the penetration of more than 90% of ultraviolet rays. You can choose polarized sunglasses with the "UV400" best blocking UV logo; low-quality polarized sunglasses, such as dark sunglasses, as the light entering the human eye becomes darker, the pupil of the human eye will become larger, and the ultraviolet light entering the eye Increase, increase the damage to the eyes.
The color selection of polarized sunglasses should be based on the principle that the color of the surrounding environment is not distorted, the edge of the object is clear, and the signal lights of different colors can be effectively recognized. Especially when driving sunglasses, to ensure driving safety. The color of the lens is gray, brown, and green, because the lens of these colors absorbs infrared and ultraviolet rays better, which can improve the visual contrast and clarity, and it is particularly good to wear under severe air pollution or foggy conditions.
Genuine polarized sunglasses must be comfortable to wear; inferior lenses have no technical and functional properties at the time of manufacture, and the lens materials are also very inferior. After wearing, they feel uncomfortable, dizzy, headache, dry eyes, tingling, etc., they should be stopped immediately.
Most polarized sports sunglasses frames are designed with veneer arcs, which can effectively prevent wind and foreign objects from stimulating the eyes in outdoor sports. In addition, the rigidity of the polarized lens and the flexibility of the material of the frame have considered whether it will harm the human body.
Polarized sports sunglasses, polarized lens sunglasses, UV polarized sunglasses, custom polarized sunglasses are common polarized glasses on the market, welcome to consult our glasses experts to match you with the most suitable polarized sunglasses. You can also log on to Emma glasses official website for self-service shopping!