From Benjamin Franklin to Rimless Bifocal Sunglasses
The United States gentleman of science, Ben Franklin, who endured both myopia as well as presbyopia, devised bifocals in 1784 to obviate having to often switch between 2 pairs of eyeglasses.
The 1st lenses intended for correcting astigmia were constructed by the British astronomer George Airy in 1825.
Along the history of bifocal reading glasses, the building of eyeglass frames also evolved. In early stages oculars were designed to be either kept in place with your hand or by maintaining 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 fastened by the weight of one’s hat.
Entering modern bifocal history, the contemporary fashion of bifocal spectacles supported by temples passing over the ears, was produced in 1727 by the British lens maker Edward Scarlett. These designs were not at once 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 produced the Zeiss Punktal spherical point-focus lens system which controlled the eyeglass lens domain for many years.
Despite the improving fame of contacts and laser restorative eye surgery, spectacles remain rather popular, as their engineering has continued to improve. 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 rimless eyeglasses.
Many of these designs are also distinctly better able to resist the stresses of day-to-day wear and tear as well as the periodic accident. Contemporary frames are likewise ofttimes made from substantial, light-weight materials such as titanium alloys that weren’t available in earlier times.
