Can be used not only for glasses, but also for smartphones, PC liquid crystal displays, game consoles, digital camera screens, and various other devices. It thoroughly cleans stubborn stains on eyeglass lenses, as well as viruses and other bacteria, leaving them sparkling clean. It also prevents dust and dirt from re-adhering after cleaning. I think it's also good for hay fever対策 as the season with a lot of pollen has arrived. It's a very convenient size for carrying around.