In early history, someone noticed that convex-shaped glass magnified images. Many people like Roger Bacon, James Asycough,Giordano da Rivalto, Alessandro della Spina, Johann Gutenberg and many others. THrough out history glasses took a very look process up to the 21st century.
" it is not yet twenty years since there was found the art of
making eyeglasses which make for good vision, one of the best arts and most
necessary that the world has." - Quote from Giordano da Rivalto