Solar filters are special materials designed to reduce the intensity of sunlight, making it safe to observe the Sun directly. They block harmful ultraviolet (UV) and infrared radiation while allowing visible light to pass through. This helps protect the eyes from damage during activities like solar viewing or using telescopes and binoculars. These filters come in various forms, including glasses, film, and mounted filters for telescopes. It's essential to use only certified solar filters, as regular sunglasses or other materials do not provide adequate protection. Proper use of solar filters ensures a safe and enjoyable experience when observing solar events like solar eclipses.