Evolving Bifocal Glasses to Keep Up With Contacts
The American gentleman of science, Benjamin Franklin, who endured both nearsightedness as well as presbyopia, invented bifocals in 1784 to avoid needing to often alternate between two pairs of eyeglasses.
The original lens pair intended for correcting astigmia were distributed by the British astronomer George Airy within 1825.
Along the history of bifocal reading glasses, the building of pectacle frames also evolved. Early on glasses were contrived to be either held 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 placed over a person’s head, which in turn was fastened by the weight of a hat.
Entering modern bifocal history, the contemporary fashion of bifocal reading glasses 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 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 remain rather popular, as their technology 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 bifocals.
Many of these modern contraptions are also distinctly better able to resist the challenges of day-to-day wear and tear and the occasional accident. Contemporary frames are also frequently constructed from substantial, light-weight materials like titanium alloys which were not available in earlier years.
