Question: When was the first pair of glasses invented?
Answer: about 1290
Disambiguated annotations:
qaPairs: question: When was the first pair of eyeglasses invented?
answer: 1290
question: When were the first pair of glasses for astigmatism invented?
answer: 1825
question: When was the first pair of modern glasses, with temples passing over the ears, invented?
answer: before 1727