anchor: Trade with the Portuguese and the Dutch launched a craze for tobacco, bread, potatoes, clocks, pantaloons, and eyeglasses, the latter very often worn as a chic symbol of intellectual superiority rather than as an aid for poor eyesight.
positive: Eyeglasses were traded for and were frequently used to symbolize superiority of intellect.
negative: There were successfully enforced laws banning trade with the Dutch and Portuguese.