英文說明:Glass spectacles were introduced into China from Europe during the reign of Emperor Yongle of the Ming Dynasty. The Chinese then began making spectacles out of crystal. These glasses consist of crystal lenses and copper frames. The earpiece is decorated in the shape of ancient money. Expensive crystal spectacles for far-sighted individuals were only worn by the royal household. Affordable glass spectacles and glasses for near-sighted people would be developed later.