History
The earliest evidence of "a magnifying device, a convex lens forming a magnified image" was Aristophanes's "lens", from 424 BC, a glass globe filled with water. (Seneca wrote that it could be used to read letters "no matter how small or dim"). Roger Bacon described the properties of magnifying glass in 13th-century England. Eyeglasses were developed in 13th-century Italy.
Read more about this topic: Magnifying Glass
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