Sunglasses, also known as shades or sunnies, are a type of eyewear designed to protect the eyes from the harmful effects of the sun's ultraviolet (UV) rays. They typically feature lenses that are tinted or polarized to reduce glare and improve visibility in bright sunlight. Sunglasses come in a variety of styles, shapes, and sizes, and may be worn for fashion or practical purposes. Some of the benefits of wearing sunglasses include reducing the risk of cataracts, preventing wrinkles and other signs of aging around the eyes, and improving vision in bright light conditions.