When it comes to magnifiers, most people know and have seen them. The first impression that comes to mind is that they have a handle and a round frame lens. Magnifying glass is too widely used in daily life. It is widely used to solidify people's impression of it, and has become a necessary but neglected tool in life. In fact, the magnifying glass with more than 700 years of history is far more than the concept of solidifying people's impression.

Many people know magnifying glass, but in fact, not many people know it. The origin of magnifying glass can be traced back to more than 1000 years ago. People have ground transparent crystal or transparent gem into "lens", which can magnify images. However, due to the rough process, unreasonable lens material and other factors, there is no real sense of magnifying glass.

Magnifying glass in the modern sense came into being more than 700 years ago. It is said that it was invented by a bishop, grosstest. It can be said that the magnifier is an ordinary and great invention in history. The commonness lies in that the magnifier is a tool and assistant for life and work, which can not be compared with the inventions such as steam engine and electric power that change the fate of human society. The greatness lies in that the magnifier has solved the problem of people's aging eyes and can't see clearly.

Source: @sean_pingils_tattoos