 In 1907 Professor Berthold Laufer speculated, in his history of glasses, that for glasses to be mentioned in the literature of China and Europe at approximately the same time it was probably that they were not invented independently, and after ruling out the Turks, proposed India as a location.However, Joseph Needham showed that the mention of glasses in the Chinese manuscript Laufer used to justify the prior invention of them in Asia did not exist in older versions of that manuscript, and the reference to them in later versions was added during the Ming dynasty.In 1971 Rishi Agarwal, in an article in the British Journal of Ophthalmology, states that Vyasatirtha was observed possession a pair of glasses in the 1520s, he argues that it