In the previous article, we discussed “What is the best color tint for sunglasses?”. In this article, let’s talk about “Why should you wear polarized sunglasses?”.
The summer heat has caused people walking on the streets to wear sunglasses, but do you know why sunglasses can block the powerful ultraviolet rays? In addition, friends who like to drive and those who like fishing will choose polarized sunglasses. So do you know what polarized sunglasses are?
What are polarized sunglasses?
The polarizer is manufactured according to the principle of the polarization of light. We know that when the sun shines on the road or water, it directly irritates the eyes, making the eyes dazzling, fatigued, and unable to see things for a long time. Especially when you are driving a car or engaging in outdoor recreational activities, it not only affects our work and entertainment mood but also affects our judgment of objects and causes danger. Long-term exposure to direct sunlight can also cause rapid vision loss, myopia, hyperopia, astigmatism, or cataract. The special effect of the polarizer is to effectively exclude and filter out the scattered light in the beam. The light can be injected into the visual image of the eye on the transmission axis of the right track, making the vision clear and natural.
What is the role of polarized sunglasses?
Polarized light is formed by waves that all vibrate in the same direction, while ordinary light is formed by waves that vibrate non-directionally. Generally speaking, reflected light is an orderly light. The polarizing film in polarized sunglasses has a strong filter for this reflected light. This kind of lens only allows polarized waves that vibrate in a certain direction to pass through. The reflected light on the road is a special kind of reflected light, which is manifested in the disorder of light. The polarizing film in polarized sunglasses can play a role. It does not let light waves that vibrate parallel to the road pass through. In fact, the long molecules of the filter layer are oriented in the horizontal direction and can absorb horizontally polarized light. In this way, most of the reflected light is eliminated, and the overall illuminance of the surrounding environment is not reduced.
In addition to some reflected light, harmful rays in life are also the most mentioned ultraviolet rays. Ultraviolet rays not only cause damage to the skin of the human body but also cause great damage to the eyes and cause eye diseases. The anti-ultraviolet film in polarized sunglasses can effectively resist ultraviolet rays and protect the eyes. For some people who have undergone ophthalmological surgery, if they are not comfortable with the outside light, wearing polarized sunglasses can protect their eyes well.
Where to use polarized sunglasses?
Polarized sunglasses are used especially on many occasions. For example, when driving a car, with the function of polarized sunglasses, there is no need to worry about the front light is too strong, and the vehicle light is too glaring. When fishing, you don’t have to worry about the reflected light of the water surface. For outdoor sports, do not have to worry about the damage of ultraviolet rays. This is why polarized sunglasses are used as driving mirrors, fishing glasses, and so on.
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