Glasses are lenses embedded in the frame and worn in front of the eyes to improve vision, protect the eyes or for decorative purposes. There are also special glasses for viewing 3D stereo images or virtual reality images.

Modern glasses are usually equipped with a nose support (nose brace) in the middle of the lens and a cushion at the position where the left and right arms rest on the ear.

Glasses are composed of lenses and frames. According to the purpose of glasses, there are 15 kinds of glasses, including myopia glasses, hyperopia glasses, presbyopic glasses and astigmatic glasses, flat glasses, computer goggles, goggles, goggles, goggles, night goggles, sports goggles, sports goggles, goggles, sunglasses, toy glasses and sunglasses. There are also special glasses for viewing 3D stereo images or virtual reality images. Other types of glasses include goggles, sunglasses, swimming goggles, etc., providing various protective effects for the eyes. Modern glasses are usually equipped with a nose support in the middle of the lens and a cushion in the position where the left and right arms rest on the ear. People who love beauty or are not used to wearing glasses can choose to correct their vision with contact lenses.