Have you ever worn photochromic glasses? These glasses have lenses that are clear when you are indoors, and when you are outdoors, the lenses darken in color, making them look like sunglasses. When you go back indoors, the lenses return to their original color. Today we will discuss how photochromic lenses work and why we need them.
How do photochromic lenses work?
The chemistry behind the seemingly miraculous function of photochromic lenses is not difficult to understand. Photochromic lenses are made with a special chemical substance that undergoes a chemical change when exposed to sunlight, causing the lenses to darken in color. This chemical change is reversible, and when the light decreases, the substance releases its energy and the lenses return to their original color. Therefore, the rate and degree of color change of photochromic lenses
