Anti-fog coatings are special treatments applied to surfaces, such as glasses or goggles, to prevent fogging. When temperature changes occur, moisture can condense on these surfaces, creating a foggy appearance that obstructs vision. The coatings work by spreading water into a thin, even layer, which helps maintain clarity. These coatings are commonly used in various applications, including safety goggles, swimming goggles, and eyewear. They can be found in both permanent and temporary forms, with some requiring reapplication after a certain period. Anti-fog coatings enhance safety and comfort in activities where clear vision is essential.