Visors are protective devices worn on the head, typically made of plastic or glass, that shield the face and eyes from various elements. They are commonly used in activities like cycling, construction, and sports to provide visibility while offering protection from sunlight, debris, or impacts. In addition to traditional visors, there are also face shields that cover the entire face, often used in medical settings or during hazardous work. Visors can be adjustable and come in various styles, making them versatile for different purposes and preferences.