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A good pair of frames should be constructed of materials that are safe, reliable, and harmless to the skin, and should be lightweight, strong, and non-distorting when worn on the face.

Secondly, for the wearer, it is also necessary to purchase from the perspective of the practicality of the frame.

When choosing a frame to wear according to the visual condition and purpose, the glasses are for long-term wear, and other conditions can be appropriately relaxed to choose a light frame to reduce the fatigue of wearing.

If the glasses are only worn under the condition of concentrated eye use such as reading and watching the computer, the frame can be selected completely according to individual needs.

Those with high myopia should not choose half-frame and rimless frames, because the thickness of the lenses is not only unsightly but also easy to damage when matched with rimless frames.

Those with higher astigmatism should not choose rimless frames, because the lenses with rimless frames will have the problem of displacement of the astigmatism axis after long-term use, which will lead to deformation of the viewed objects.

Specific needs: If the purpose of glasses is largely to match the image and the occasion. At the same time, in the case where the vision condition does not limit the frame, you can choose according to your specific needs.

1. On the color and luster - see the depth.

Lay the glasses flat in front of your eyes, and observe whether there is a difference in the color of the temples under the same light intensity. Sometimes due to processing errors, the color of the left and right temples will be asymmetrical.

2. In terms of craftsmanship - look at the details.

Craftsmanship is the quality assurance of the frame, and the quality of a pair of frames is often reflected in the details.

(1) Whether the two temples are flat. Place the frame flat on the table to see if the contact point is free. If there is a situation where one side is high and the other is low, it is necessary to ask professionals to adjust the temples to achieve the effect of left and right balance and up and down symmetry.

(2) Pay more attention near the welding point of the metal frame to see if there are any cracks. Due to the thermal effect during welding, the stress structure of the material is changed, or it is prone to fracture when subjected to force due to virtual welding, material fatigue, etc.

(3) Pay attention to whether the stipules of the frame are symmetrical on both sides and whether the fixation is safe.

(4) Open and close the temples and feel the elasticity. It is generally wrong to think that the tighter the better, which means that the lubricating degree of the screw is not enough, and it is easy to cause damage to the temple. Too loose is not good, and the screw may not be tightened. Moderate tightness is best.

3. On the logo - look at the material.

Many frames will have the frame material marked on the temples, especially the precious metal frames of gold and titanium. Let's take a brief look at their logos.

(1) GF/GP: GF is a gold-clad frame, that is, a frame made of thin gold sheets welded on other metal substrates and rolled; GP is a gold-plated frame, that is, a frame made of gold plated on other metals by electroplating Frame surface.

(2) Ti-P/Ti-C: Ti is a logo containing titanium materials, Ti-P stands for pure titanium, Ti-C stands for titanium alloy, and so on.

What is the difference between titanium, titanium alloy, beta-titanium, and memory alloy?

A. Pure titanium.

When the titanium purity reaches more than 99%, the titanium metal material can be called pure titanium glasses. The frame made of pure titanium material has excellent characteristics such as high melting point, light material, strong corrosion resistance, and firm electroplating layer, which can ensure the two important properties of the beautiful and durable glasses frame.

B. Beta Titanium.

It can be understood as another molecular state of titanium material. Although the purity of beta titanium cannot be compared with pure titanium, its strength, fatigue resistance, and environmental corrosion resistance are better than pure titanium.

C. Titanium alloy.

The definition of titanium alloy is relatively broad, as long as it contains titanium material, it can be called titanium alloy. Therefore, the quality and grade of titanium alloy glasses frames are uneven, and the composition of titanium alloy has a direct impact on the price of titanium alloy glasses. The use of titanium alloy to make glasses is not to reduce costs, but to improve the application performance of materials.

D. Shape memory alloys.

It is composed of nickel, titanium, vanadium, and other metals, and has an excellent elasticity. If the temples encounter external force, the bending degree can exceed BETA-titanium alloy, and can return to the original state, so it is named shape memory alloy.

The difference in titanium prices is not just the price, but more importantly, they each have unique craftsmanship and product performance. So it is not which kind of material frame is definitely more expensive.