Eyeglasses, also known as spectacles or glasses, are a type of vision correction device that consists of lenses mounted in a frame that sits on the bridge of the nose and ears. They are designed to correct refractive errors, such as nearsightedness, farsightedness, and astigmatism, which can affect a person's ability to see clearly.

Eyeglasses come in a variety of styles, sizes, and materials to suit different preferences and needs. Some common materials used for eyeglass frames include metal, plastic, and titanium, while lenses can be made from glass, plastic, or polycarbonate.

In addition to correcting vision, eyeglasses can also be used for other purposes, such as protection from harmful UV radiation or blue light emitted by electronic devices. Some eyeglasses are also designed for specific activities, such as sports or reading, and may have features such as impact-resistant lenses or magnification.

If you need eyeglasses, it's important to get an eye exam from an eye doctor to determine your prescription and ensure proper fit and function of the glasses.