Developing the Perfect Pair of Rimless Bifocals
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The American man of scientific discipline, Ben Franklin, who endured both nearsightedness as well as presbyopia, devised bifocals in 1784 to obviate having to frequently switch between two sets of glasses. The 1st lenses for correcting astigmia were distributed by the British stargazer George Airy in the year 1825. Along the history of bifocal reading […]
The 1st lenses for correcting astigmia were distributed by the British stargazer George Airy in the year 1825.
Along the history of bifocal reading glasses, the building of pectacle frames also progressed. Early on oculars were contrived to be either held in place with your hand or by keeping force on the nose. Girolamo Savonarola advised that oculars could be held in place with a ribbon passed over a person’s head, which in turn was held secure by the weight of one’s hat.
Entering modern bifocal history, the contemporary fashion of bifocals supported by temples passing over the ears, was produced in 1727 by the British lens maker Edward Scarlett. These designs were not instantly prosperous, however, and assorted styles with attached handles like “scissors-glasses” and lorgnettes stayed fashionable throughout the eighteenth and into the early nineteenth century.
In the early 20th century, Moritz von Rohr at Zeiss made the Zeiss Punktal spherical point-focus lens system which dominated the eyeglass lens field for several years.
Despite the improving fame of contacts and laser restorative eye surgery, spectacles stay quite common, as their technology has continued to evolve. For example, it’s currently possible to buy frames constituted of special memory metal alloys that return to their correct configuration after being bent. Other frames have spring-loaded hinges.
Glasses have come a long way, haven’t they? In fact, today you can even buy bifocal sunglasses.
Most of these modern contraptions are also distinctly better able to resist the challenges of day-to-day wear as well as the periodic accident. Contemporary frames are also frequently constructed from robust, light-weight materials such as titanium alloys that weren’t obtainable in earlier days.
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