A good pair of best place to buy eyeglasses should be made of safe, reliable, skin-friendly materials that are lightweight, strong, and not deformed when worn on the face. In addition to choosing a trusted brand, you have to learn some simple ways to observe the quality of the frame, so as not to be blinded by market gimmicks.

1. Look at the welding of the frame

The frame is welded with many small parts, so in the selection of the quality of the frame, it is necessary to carefully observe whether the welding position of the frame is firm and beautiful.

The most important position is the lock block (that is, the small square that locks the lens), because it has to be stressed for a long time, so the welding of the lock block is very important.

2, look at the process details

1. Whether the two mirror legs are smooth. Place the frame flat on the table and see if the contact point is suspended. If one side is high and the other side is low, it is necessary to require professional knowledge to adjust the mirror leg to achieve the effect of left and right balance.

1. The brackets of the frames should pay attention to whether the two sides are symmetrical and whether the fixed degree is safe.

1. For metal eyeglass frames, you can pick your nails to see if there will be scratches on the paint (if you have already said it). For the glass frame of the plastic sheet, carefully observe whether the surface of it has plastic particles and is rough.

1. Open and close the mirror leg to feel the elasticity. It is generally believed that the tighter the better view is wrong, that means the lubrication of the screw is not enough, easy to cause damage to the mirror leg, too loose is not good, may be caused by the screw is not tightened. Moderate tightness is best.

Metal frame

A, alloy material

There are white copper (mainly copper, mainly add nickel, zinc, etc.), manganese nickel (mainly manganese, mainly add nickel, etc.), high nickel (mainly nickel, add chromium, manganese, etc.), nickel copper (mainly nickel, add copper, etc.) and other alloy materials, in strength, corrosion resistance and other physical and chemical properties are slightly different.

Advantages: Low material price (especially white copper). Low processing difficulty. Easy to adjust the frame.

Disadvantages: plating adhesion is poor, easy to corrode and rust. Some people are susceptible to metal allergies. Susceptible to extrusion deformation. It's heavy.

B, stainless steel material

Basically, it is made of thin sheet stainless steel material.

Advantages: Good flexibility, resistance to deformation. Light weight. Surface IP plating treatment, durable.

Cons: Can't adjust. Lenses with higher degrees are thicker, affecting the appearance. The frame treated with paint on the surface is easy to remove paint and is not durable.

C, pure titanium material

Ideal metal frame material.

Advantages: high strength, not easy to deformation, but adjustable frame. Not susceptible to metal allergies. IP plating after high adhesion, high durability. It has a light weight.

Disadvantages: The material price is high, the processing is difficult, resulting in higher prices.

D, beta titanium material

It is widely used in the frames with high elastic requirements, such as fine wire foot, nose fall and slim frame.

Advantages: Good flexibility, not easy to deform. It has a light weight.

Disadvantages: not suitable for high number of people (the front end of the frame is too heavy to slide, the lens is too thick to affect the appearance), can not be adjusted. The material price is high. The processing is difficult and the price is high.