The first evidence of a magnifying device is provided in a comedy play entitled 'The Clouds', during which a magnifying lens is used to set wood on fire.
During the first century, the Egyptians discovered an almost clear crystal called obsidian which they used to view small objects.
Romans studied glass during the first century AD.
Arab scientist Alhazen (born 965 AD) researches magnifying glasses.
During the thirteenth century, the properties of a magnifying glass are described by Roger Bacon.
Hand-held magnifying glasses produced using glass lenses and metal and wooden frames.
Today, magnifying glasses continue to be produced by numerous manufacturers for numerous purposes.