About Sunglasses

Sunglasses belong to a kind of eye care products which are used to prevent strong stimulation of sunlight from injuring the human eyes. Of course, along with the improvement of people's material and cultural level, sunglasses can also be embodied as a personal style of beauty or special jewelry. 

Some advantages of sunglasses: 1. decorating the facial appearance; 2. blocking the defects on eyes; 3. eye protection from the strong sunlight; 4. to protect people’s eyesight (anti harmful rays).

Meanwhile, sunglasses have few disadvantages. The poor quality sunglasses lenses are prone to bring harms to eyes. So when you decide to buy one pair, its quality is of great importance.

Categories of sunglasses:

Generally speaking, according to their function, sunglasses can be divided into three types: the adumbral sunglasses, light-colored sunglasses, and special-purpose sunglasses.

First, the so-called adumbral glasses, as its name implies, are used for shade. When under the sunlight, people normally must rely on the regulation of pupil size to regulate the flux. If the light intensity is more than that people can regulate, it will cause harm to the human eyes. Thus, while in the outdoor activities, especially in the summer, many people would like to use this kind of sunglasses to block out the sun shade in order to reduce eye fatigue caused by regulation or injuries caused by light stimulation.

Second, the light-colored sunglasses are not as useful as the adumbral glasses in the aspect of harmful UV prevention, but they are rich in colors and suitable for match with all kinds of clothing, so this type of sunglasses has a strong role in the decoration.

Nowadays, light-colored sunglasses, because of its various colors, styles and diversity, are preferred by the popular group of young. In particular, the fashionable women are running after them.

Third, special-purpose sunglasses have a strong function of the sunlight block, commonly used in the places where the sunlight is relatively strong, such as the beach, skiing, mountain climbing, and so forth. Its UV prevention performance and other indicators generally have higher requirements.

In a word, different groups of people should select the sunglasses according to their different preferences and different uses, but the most fundamental is to protect the wearer from safety and not being damaged as the basic principle. To reduce the light stimulus, prevent the material deformation, anti-UV, non-distortion of color recognition and accurate identification of the traffic signal should be the basic functions of sunglasses. If there are deficiencies in these functions, people will be easy to feel dizzy, eye fatigue and uncomfortable; even more, sometimes customers may be slow to respond, have dialectical illusion and other inequality symptoms which may even lead to accidents occasionally.

So when you chose sunglasses, you should not only focus on styles, more importantly you should pay special attention to their inherent qualities.