The form of eyeglass frames can be divided into full frame, half frame, frameless, and browline frame according to the installation method of the lenses.

Full-frame glasses are glasses that are completely wrapped around the lens frame, which has the advantage of firmly fixing the lens and preventing it from falling off. The frame is fixed to the lens with screws.

So it is very convenient to unscrew the screws to clean or replace the lenses, which is easier to maintain the glasses. However, the disadvantage is that there is an extra half frame, which increases the weight of the glasses.

The upper part of the lens of the browline frame glasses is wrapped and fixed by the frame, while the lower part is fixed with a ribbon. Without half the frame, the weight will be lighter than that of the full frame, but the firmness will be slightly lower. Moreover, the lens is difficult to remove and requires special tools. Half-frame glasses give a sense of refinement.

As the name suggests, frameless cheapest eyeglasses are lenses that are not fixed by the frame but are fixed by screws through holes drilled into the lens legs, greatly reducing the weight of the frame and minimizing the impact of the glasses on the appearance.

However, the overall stability of frameless glasses is not good, and they are prone to deformation. All external forces on the glasses will be concentrated on the fixing screws, and the lenses are prone to damage. Protective lenses without frames are also prone to wear and tear.

In addition, the side of the lens is fully exposed, so it is not suitable for lenses with a high prescription and large thickness, otherwise, it may make people feel that the glasses are bulky when viewed from the side.