Magnifier Classification

Magnifying glasses can be classified into portable magnifying glasses and desktop magnifying glasses according to their appearance. Desktop magnifying glasses can be fixed, with a base below and a magnifying glass above. The shape of the magnifying glass can be rectangular, square, or circular. These magnifying glasses are mainly used for long-term fixed viewing of a place.
Desktop magnifying glasses have long arms and curved areas, allowing for easy adjustment of position as needed.
Portable magnifying glasses are like the one above, with a circular magnifying glass at the front and a handle at the back. There are also many types of portable magnifying glasses, some of which are square or can be combined. These magnifying glasses are mainly convenient to carry and observe. There are also portable magnifying glasses with and without light sources. Magnifying glasses with light sources have many advantages when viewing, as the light remains stable.
Classified by user group:
It can be divided into elderly reading magnifying glasses, children's magnifying glasses, outdoor portable magnifying glasses, and professional appraisal and measurement magnifying glasses;
Glasses can also be considered as a type of magnifying glass. There are rumors that this masterpiece was invented by some people in the late 13th century.
Perhaps an unknown craftsman from China
It could also be Alessandro di Spina from Doscany, Italy.
Or perhaps it was British scholar Roger Bacon.
In 1260, Marco Polo described how Chinese elderly people wear glasses to enlarge their font when reading.
A large oval shape is made by grinding crystal stone, quartz, topaz, and amethyst into lenses, and setting them inside a turtle shell as a frame. The glasses legs are fastened to the temples with copper, tied to the ears with a thin rope, and fixed to the hat.
At that time, magnifying glasses were expensive and a symbol of status. There was once a gentry who exchanged a horse for a pair of glasses.
If it's just a magnifying glass, hold it in your hand while reading.
The high transparency lenses made in Venice and Nuremberg were famous in Europe.