2006-12-21 05:42:05 · 4 answers · asked by Me 3 in Science & Mathematics ➔ Engineering
China
2006-12-21 05:49:02 · answer #1 · answered by Jay 2 · 0⤊ 0⤋
All though wearable glasses were invented around 1284 reading aids were available much earlier there was such a thing as a reading stone A reading stone was an approximately hemispherical transparent object placed on top of text to magnify the letters so that people with presbyopia could read the text more easily. Reading stones were among the earliest common uses of lenses. Reading stones were said to be invented by Abbas Firnas, in 8th century in Córdoba, Spain, who had devised a way to finish sand into glass which until this time, was secret only to the Egyptians. These glasses could be shaped and polished into stones used for viewing. These spread to the rest of Europe from approximately the 11th century onwards. The function of reading stones was replaced by the use of spectacles from the late 13th century onwards.
2016-03-29 02:45:17 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Benjamin Franklin is given the credit for the invention.
2006-12-21 06:16:43 · answer #3 · answered by Gene 7 · 0⤊ 0⤋
Some of the first glass is where lightning strike sand dunes and melt it together.
2006-12-21 08:23:14 · answer #4 · answered by JOHNNIE B 7 · 0⤊ 0⤋