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Man with glasses. A woman with glasses. Glasses, also known as eyeglasses or spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears for support.
Often used by monks to assist in illuminating manuscripts, these were primitive plano-convex lenses, initially made by cutting a glass sphere in half. As the stones were experimented with, it was slowly understood that shallower lenses magnified more effectively. Around 1286, possibly in Pisa, Italy, the first pair of eyeglasses was made ...
The first incarnations of glasses were made with the aim of providing aid to reading. [ 8 ] Though innovations in pre-modern eyewear technology occurred in both Imperial China and the Inuit territories, which both invented early forms of sunglasses and goggles, [ 9 ] Venice and Northern Italy have historically been the place of consolidation ...
The site of Kopia, in Uttar Pradesh, is the first site in India to locally manufacture glass, with items dating between the 7th century BCE to the 2nd century CE. [22] Early Indian glass of this period was likely made locally, as they differ significantly in chemical composition when compared to Babylonian, Roman and Chinese glass. [21]
One major expense for glass factories is fuel for the furnace, and this often determined the location of the glass works. [15] Glassmakers originally used wood for fuel in Colonial America. Coal first began being used in the 1770s. [16] Alternative fuels such as natural gas and oil were not used in the United States until 1875. [17]
Kicking back with a glass of wine is certainly one way to relax, but how about watching how your glass got made in the first place? This mind-blowing video shows how wine glasses are made in a factory
One time I was sanding some pieces from my 3D printer using a rotary tool and suddenly got the idea that I should be wearing safety glasses. Only I didn't own any, so I drive my a*s to Walmart and ...
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