What kinds of color-changing lenses are there?

As summer approaches, the weather is getting hotter and the sunshine is getting stronger and stronger. Many friends choose to wear color-changing glasses to keep their eyes healthy when they go out. There are many kinds of color-changing lenses, and the effect will be different according to different materials. What is specifically introduced below? Double lenses: patients with myopia or astigmatism need hyperopia glasses and myopia glasses. In this way, sometimes he needs to change the mirror repeatedly to meet the needs of seeing far and near for a while, which is very inconvenient. ? Double lenses solve the trouble of changing lenses frequently, and make a pair of glasses with hyperopia and myopia lenses, which is very convenient to use. The double lens has the phenomenon of "light jump", when it is first worn; There will be a feeling of inadaptability, and it will take a short time to adapt. There are many kinds of color-changing lenses.