Frequently keeping the optical glass clean will increase the life of the optical glass. Because pollution can cause many problems in the lens, the uneven distribution of the laser power during reflection makes the base temperature of the lens high and the marginal temperature low. Such changes are called lens effect in optics.

Failure to comply with the requirements and precautions for lens finishing and arbitrary handling will result in new pollution and even scratches to the optical glass, resulting in losses. Usually should pay attention not to let the mirror directly touch the hard object, scrub first with water (or mixed with a few detergent) clean, and then with a test cloth or excellent cotton paper dry the water droplets on the lens. If the lens has no scratches, it can not be used all the time.

The processing of the lens is made of liquefied monomer solidified by high temperature or ultraviolet radiation. With the change of environment and temperature as the application cycle gets longer, the film layer on the surface of the lens and the material of the lens itself will change, resulting in light scattering and decreased comfort. The dry and bulging eyes will appear after long use. At this time, it is necessary to replace the optical glass.