Any theory cannot be separated from the study of fundamental knowledge. Glasses are simple optical devices made to correct vision or protect the eyes, and with the development of the times, the role of eyeglasses online has become increasingly diversified.

In addition, they all have a commonality, which is to play a certain decorative and aesthetic role. The improvement of aesthetics has taken our pursuit of glasses one step further.

Glasses are composed of lenses and frames. And the frame has more structural subdivisions. Glasses may seem simple, but a small structural difference defines different types.

The most common type of lens we see in daily life is full frame, but there are also differences such as browline frame and frameless. Each type of lens has its rounding and prescription. Material is not the key point, a simple understanding is sufficient.

How to choose a frame? Do you remember when you were a child, you thought others looked great wearing glasses? Just choose the frame. So, let's first understand what is a suitable frame.

Pay attention to the position of the upper frame, lower frame, and post head. The upper frame should not exceed the brow bone, the lower frame should not exceed the middle of the nose, and the post head should not exceed the ear side position. Also, pay attention to the turning position of the temple, which should not be too long or too short. This is the most basic requirement, except for some special eyeglass structures.

Quantitative sensation refers to the proportion of facial features on the face. The facial features are three-dimensional, with a large proportion of the face and a greater sense of volume. Choosing a wide eyeglass online frame can make people feel that their head is heavier and unbalanced. So you can choose a slightly narrower frame.