The difference between optical lens and ordinary lens is that optical lens has high transparency, high uniformity of physical and chemical properties and specific and very accurate optical constants, which are irreplaceable by ordinary lens. The processing of optical lenses is also very complicated, including optical cold working and polishing of glass lenses.

First, some rough substances on the outer surface of the optical lens should be wiped off, and the optical lens should be polished first, and then polished again. Then there is the polishing of optical lenses. In this step, the operator should cooperate with the polishing machine and polishing powder. Polishing operation can make the appearance of optical lens fine and smooth. After polishing, there is another cleaning. After cleaning, the optical lens is polished according to the outer diameter of the required lens. Then the optical lens can be coated with one or more layers with different colors. Then the outer edge of the optical lens is inked, and the role of inking is to prevent the lens from reflecting light. After the inking of optical lenses is completed, the last step of optical cold working is to combine and stick two optical lenses together with a special glue. The r values of the two lenses need to be opposite while maintaining the same size and outer diameter.

As can be seen from the above, the fine processing of optical lenses makes the lenses with power more accurate and qualified, and makes people wearing glasses feel more comfortable. The correct processing method of optical lenses will not damage our eyes. However, once there is an error in the processing of optical lenses, the processed optical lenses can not be worn, and if worn, it will cause immeasurable harm to the wearer's eyes.