People often pay attention to the physical properties of glasses, while ignoring the physiological and pathological relationship between glasses and the human eye. Glasses are not only optical instruments, but also commodity, and special medical instruments. Lens materials and design parameters can cause eye diseases that affect not only vision but also human health. Therefore, many countries have a series of legal provisions to ensure the quality of lenses and their safety and effectiveness in use.
Glasses are medical instruments
- Jan 28, 2019-