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The Glasses Apostle by Conrad von Soest (1403) Seated apostle holding lenses in position for reading. Detail from Death of the Virgin, by the Master of Heiligenkreuz, c. 1400 –1430 (Getty Center). French Empire gilt scissors glasses (with one lens missing), c. 1805
Modern glasses, the most dominant form of eyewear. Eyewear is a term used to refer to all devices worn over both of a person's eyes, or occasionally a single eye, for one or more of a variety of purposes. Though historically used for vision improvement and correction, eyewear has also evolved into eye protection, for fashion and aesthetic ...
It has been proposed that glass eye covers in hieroglyphs from the Old Kingdom of Egypt (c. 2686–2181 BCE) were functional simple glass meniscus lenses. [40] The so-called Nimrud lens, a rock crystal artifact dated to the 7th century BCE, might have been used as a magnifying glass, although it could have simply been a decoration. [41] [42 ...
In 1876, brilliant inventor Thomas Edison added one more patent to his collection, which would eventually number 1093 in total, when he patented his electric pen.
Gernsback demonstrating his television goggles in 1963 for Life magazine Gernsback watching a television broadcast by his station WRNY on the cover of his Radio News (Nov 1928) Hugo Gernsback ( / ˈ ɡ ɜːr n z b æ k / ; born Hugo Gernsbacher , August 16, 1884 – August 19, 1967) was a Luxembourgish American editor and magazine publisher ...
Raw glass was produced in geographically separate locations to the working of glass into finished vessels, [33] [34] and, by the end of the 1st century CE, large scale manufacturing, primarily in Alexandria, [35] resulted in the establishment of glass as a commonly available material in the Roman world.
Glass humidity, i.e. the presence of water in the material, has a strong influence on the transmission curve of glasses in the 2.9 μm to 4.2 μm region. Water takes the form of OH − groups, whose O-H bond vibrates at a frequency of around 90 THz, equivalent to an absorption of wavelengths from 2.9 μm to 3.6 μm. The higher the humidity of ...
For water sports, so-called water sunglasses (also: surf goggles or water eyewear) are specially adapted for use in turbulent water, such as the surf or whitewater. In addition to the features for sports glasses, water sunglasses can have increased buoyancy to stop them from sinking should they come off, and they can have a vent or other method ...