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TLDR: Glasses are eyewear that help people see better. They have lenses that correct vision problems and are held in a frame that sits in front of the eyes. Glasses can be used for vision correction, eye protection, and fashion purposes. Sunglasses are a type of glasses that protect the eyes from bright light and harmful UV rays.

Glasses, also known as eyeglasses or spectacles, are a form of vision aid. They consist of lenses (clear or tinted) mounted in a frame that holds them in front of a person's eyes. The frame usually has a bridge over the nose and hinged arms that rest over the ears.

Glasses are primarily used for vision correction. They can help people with nearsightedness, farsightedness, and astigmatism see more clearly. The lenses in glasses bend the light entering the eyes to correct these refractive errors. Glasses can significantly improve the quality of life for wearers by enhancing their visual experience and reducing eye strain.

In addition to vision correction, glasses are also used for eye protection. Safety glasses are worn by construction workers, lab technicians, and athletes to protect the eyes from flying debris, radiation, and other hazards. Sunglasses are a type of glasses that provide better vision in bright daylight and protect the eyes from excessive UV light. They are also worn for fashion purposes.

There are different types of glasses available, including reading glasses for close-up vision, bifocals and trifocals for multiple vision corrections, and progressive lenses that have a continuous gradient. Glasses can be made from various materials such as plastic, metal, and natural materials like wood or bone. The frames of glasses come in different shapes and styles to suit individual preferences.

Overall, glasses are a versatile and essential tool for improving vision, protecting the eyes, and expressing personal style.

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