#3 SPECTACLES
We use spectacles for two main reasons: vision correction and eye protection. In historic times, monks and scholars who were using an early prototype of eyeglasses had to hold the lenses in front of their eyes or balance them on their noses to keep them from falling off.
As printed books became easily available in the 1900s, the number of cases of myopia increased, which led to eyeglasses being produced in greater quantities.
Modern spectacles can be used to correct both distant and near vision (bifocal glasses) and shield against ultraviolet light (sunglasses), the latter of which has taken on a new twist as a fashion statement.
