Sunglasses are a type of eyewear designed to protect the eyes from sunlight and high-energy visible light that can cause discomfort or damage to the eyes. They typically have lenses that are darkened or polarized to reduce glare and block UV rays. Sunglasses come in a variety of styles, including aviators, wayfarers, and cat-eyes, and can be made with different materials such as plastic, metal, or wood. Some sunglasses also feature additional features like gradient lenses or mirrored coatings. They are often worn as fashion accessories, but can also be used for sports or outdoor activities where eye protection is important.

What are "sunglasses"?

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