Cách sử dụng
The word "eyeglass" usually refers to a single lens or piece of glass that helps someone see better when they have trouble with their eyesight. People who wear eyeglasses usually wear two lenses, one for each eye. Eyeglasses are commonly used as a vision aid by people who need them to see clearly. They are also sometimes used as a fashion accessory, with many different styles and colors available. The word "eyeglass" can be used in casual conversation or formal writing about vision or optical tools.