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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.
The first known author of a treatise on geometrical optics was the geometer Euclid (c. 325 BC–265 BC). Euclid began his study of optics as he began his study of geometry, with a set of self-evident axioms. Lines (or visual rays) can be drawn in a straight line to the object. Those lines falling upon an object form a cone.
Eyewear frames around this time were mainly made of animal bones, horns and fabric; the implementation of wire frames in the 16th century further allowed glasses to be mass-produced. The 16th century also saw the earliest ancestors of pince-nez eyewear, which secured itself to the wearer through "pinching" the nose and later would become ...
Original bifocals were designed with the most convex lenses (for close viewing) in the lower half of the frame and the least convex lenses on the upper. Up until the beginning of the 20th century two separate lenses were cut in half and combined in the rim of the frame.
Check out these smart famous glasses wearers: Researchers at the University Medical Center in Germany linked spending more time in school and achieving higher level of education to nearsightedness.
To combat fake solar eclipse glasses, the American Paper Optics team created the Core Four elements of eclipse glasses to look out for to ensure your safety during the solar event.
A pair of horn-rimmed glasses. Horn-rimmed glasses are a type of eyeglasses. Originally made out of either horn or tortoise shell, for most of their history they have actually been constructed out of thick plastics designed to imitate those materials. They are characterized by their bold appearance on the wearer's face, in contrast to metal ...
The answer was “girls who wear glasses.” Defending champion Will Wallace got the answer right. “Yeah, a little problematic,” host Ken Jennings said after Wallace gave his answer.