The size of the frame, then take a look at the legs of the eyeglass online. I don't know if I have this feeling, but after putting on some glasses, I feel like they often slide down, or else I feel like the glasses are very tight. This situation is likely due to poor selection of the length of the mirror legs.

For the material of the frame, let's first conclude that if you can choose titanium or titanium alloy, don't choose other metal alloys. I don't have a deep understanding of eyeglass materials, and these materials don't quite meet my aesthetic preferences, so I mainly focus on metal frames.

Let's first talk about titanium as a material. The raw material cost of titanium is not high, and when searched the cheapest eyeglasses online, very little titanium is used for an eyeglass frame, so the raw material cost is not high. However, the processing technology of titanium is relatively complex and the yield is low, which leads to the fact that titanium products that truly enter the eyeglass mart are relatively expensive.

When choosing a frame, it is easy for us to fall into the misconception that the lighter the better. This concept is indeed true for people with low alcohol content. After all, the degree is low. If the glasses can easily penetrate the hair, it can naturally reduce the pressure on the opposite side.

However, for high-altitude individuals, blindly choosing light eyeglass frames may cause the glasses to lose balance. This principle is very simple. The frame is light, the lenses are heavy, and when you put it on, it will be top-heavy and feel like all the weight is pressing on your nose. So the more important thing is to choose an eyeglass frame that suits your degree.