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Glasses, also known as ... suggested that Franklin had indeed invented bifocals, and perhaps 50 years earlier than had been originally thought. [56] ...
Edward Scarlett (1688 – 1743 in London) was an English optician and instrument maker, who first invented an eyeglass frame with earhooks in 1727. This frame is held by the nose and ears, at times the glasses were called in contrast to the nasal cannula and temples because they had short straps that pressed on the temple.
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. [39] 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. [40] [41 ...
The history of glass-making dates back to at least 3,600 years ago in Mesopotamia. However, most writers claim that they may have been producing copies of glass objects from Egypt. [1] Other archaeological evidence suggests that the first true glass was made in coastal north Syria, Mesopotamia or Egypt. [2]
Historians have produced some evidence to suggest that others may have come before him in the invention; however, a correspondence between George Whatley and John Fenno, editor of the Gazette of the United States, suggested that Franklin had indeed invented bifocals, and perhaps 50 years earlier than had been originally thought. [2]
A glass building facade. ... Glassmaking dates back at least 6000 years, ... George Ravenscroft invented lead crystal glass, ...
In 1947, just a year after Spencer’s snack food serendipity, the first commercial microwave oven hit the market. Called the “Radarange,” it weighed nearly 750 pounds and cost more than $2,000 .
Sunglasses or sun glasses ... largest producer of sunglasses with its port exporting 120 million pairs each year. ... shades were invented in the late ...