We usually know that sunglasses cover the sun, but we don't know what's the difference between polarizers and sunglasses. Today, Xiaobian will introduce the difference between the two kinds of glasses~
What are the functions of sunglasses
1、 In fact, light colored sunglasses are a fashionable variety of sunglasses. Although the sun blocking effect is less than that of sunglasses, their fundamental purpose is to play a decorative role. Relying on rich colors and fashionable styles, they are favored by the young people. In recent years, fashion women are more fond of these sunglasses which are suitable for all kinds of clothing.
2、 The sun visor is easy to understand. Literally, it is used to block the sun. If you don't wear sunglasses under strong light, you can only adjust the luminous flux by adjusting the size of the pupil of the eye, but there is a limit. Once the light intensity exceeds the adjustment ability of the eye, it will inevitably cause damage to the eyes. Therefore, in summer, sun visors should be used to protect your eyes and reduce the fatigue caused by eye self-regulation and the damage caused by strong light stimulation.
3、 Special sunglasses are the enhanced version of ordinary sunglasses. Its various indicators are higher than ordinary sunglasses. They have greater function of blocking strong light. Generally, they have different requirements for special occasions. They are often used in outdoor sports with strong sunlight and good vision, such as beach, skiing, mountain climbing and golf.
matters needing attention
Different people should choose their own Sunglasses according to different uses, but it is very important to start from the basic principle of protecting the wearer's safety and vision from damage.
Which is better, sunglasses or polarizers
Before we understand the difference between the two, let's first understand: what is polarized light? Polarized light is the irregular reflected light, also known as glare, produced by light passing through uneven roads, water and other places. When these rays directly irradiate people's eyes, they will make people's eyes uncomfortable and prone to fatigue. They can't see objects for a long time, and the clarity of the objects they see is obviously not enough.
The polarizer can filter and eliminate all kinds of glare that damage the eyes, because the polarizer re combs the irregular reflected light through the linear molecular arrangement in the lens, which makes the light in the eyes clearer and more natural.
The difference between polarizers and sunglasses
1. Different functions
Ordinary sunglasses use the color dyed on the dyed lenses to weaken all the light into the eyes, but all the glare, refracted light and scattered light enter the eyes, which can not achieve the purpose of nourishing the eyes.
One of the functions of polarizing lens is to filter glare, scattered light and refracted light, only absorb the reflected light of the object itself, truly present what you see, so as to improve the driver's vision, reduce fatigue, increase color saturation, make the vision clearer, and play the role of eye care.
2. The principle is different
Ordinary dyed lens is to use its dye to block all light, the object will change the original color of the object, what color the lens is, the object will be covered with what color. Especially when you drive with it, there is a huge color difference in the identification of traffic lights, which makes it hard to identify the green lights. It has become a traffic hazard.
Polarizer is the principle of polarized light, the object will not change color. When the vehicle is driving at a high speed, after entering the tunnel, wearing ordinary sunglasses, the light in front of the eyes immediately darkens, and it is seriously unable to see the road in front of the eyes, while the polarizer will not affect it.
3. The degree of blocking ultraviolet is different
Strong ultraviolet is the invisible killer of human beings, so polarizing lens came into being. The blocking rate of ultraviolet reaches 99%, while the blocking rate of ordinary dyed lens is quite low.
To sum up, driving requires a very high field of vision. It is necessary to improve vision, reduce fatigue and make the field of vision clearer. Only high-quality polarizing lenses can be used to nourish and protect eyes. Do not choose ordinary sunglasses, the identification of traffic lights have a huge color difference, serious can not identify the green light, thus becoming a traffic hazard.