Glasses are divided into optometry, lens selection, frame selection, polishing and assembly. Optometry is best done in the morning, which is beneficial to the accuracy of optometry. The lens materials are mainly glass and resin. The materials of the frame are mainly plastic and metal. Use a grinder to correct the shape of the lens to match the inner basket of the frame.
Extended data:
Process steps
1, steps: optometry, selection of frames and lenses; Lens processing and assembly.
2, optometry: It is recommended to optometry in the morning, because after a night's rest, there are fewer eyes in the morning to ensure accuracy and avoid visual fatigue.
3. Lens: Glass and resin are the main materials. The main feature of glass material is high light transmittance and clearer and brighter feeling. The main feature of resin material is light weight and not easy to break.
4. Frame: mainly made of TR, plate, metal and titanium. Plastic products are light in weight and are not easy to cause allergic symptoms; The plates are colorful and fashionable; Metal products are durable and not easily deformed. The titanium frame is vacuum plated and light in weight.
5. Lens processing: use grinder and other equipment to correct the shape of the lens to match the inner basket of the frame.
References:
Baidu encyclopedia-glasses