If the degree is not special, there is no problem with taking the optometry sheet for discount eyeglasses online matching. The lens is the soul of glasses, because the lens is the functional type.

 Imagine if the frame had not been invented, would you have used a pair of glasses with rubber bands and sticks? Lenses are important, even if you don't understand the importance of lenses, it's useless to talk too much. After obtaining a complete optometry sheet, you can officially start shopping for glasses.

The most important aspect of a pair of discount eyeglasses online is the lenses, which cover a wide range of technologies. To measure the quality of lenses, first conduct a small survey. As a glasses enthusiast, can you immediately tell me what brand and material your frame is, what refractive index the lens is, what brand and where the lens is made, and how the packaging and anti-counterfeiting code are?

Oh, probably not many people know. Most people only think that glasses are expensive, and refractive index is one of the most important indicators of lenses, which reflects the thickness of the lens. The higher the refractive index, the thinner the lens, and the more expensive the price. Choose according to your own degree and pupil distance, as long as it suits you.

In terms of materials, lenses are divided into glass lenses, resin lenses, PC lenses, and so on; Due to the different functions of each material, professional guidance is a key factor in selecting lenses that are suitable for oneself, taking into account the prescription and personal needs.

The advantages of discount eyeglasses online lenses are thin lenses, high clarity, and good wear resistance, but the disadvantages are heavy and fragile, and low safety.