How Modern Bifocal Reading Glasses Came to Be
The United States man of scientific discipline, Benjamin Franklin, who persevered both myopia as well as presbyopia, invented bifocals in 1784 to avoid needing to frequently alternate betwixt 2 sets of glasses.
The original lens pair for rectifying astigmia were distributed by the British stargazer George Airy within the year 1825.
Along the rich history of bi focal reading glasses, the building of pectacle frames also evolved. Early on glasses were designed to be either held in place with your hand or by maintaining force on the bridge of the nose. Girolamo Savonarola advised that oculars could be held in place with a ribbon placed over the subject’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 twentieth century, Moritz von Rohr at Zeiss made the Zeiss Punktal spherical point-focus lens system which dominated the eyeglass lens domain 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 bifocal sunglasses.
Many of these designs are also distinctly better capable of resisting the stresses of day-to-day wear and tear and the occasional accident. Contemporary frames are also ofttimes made from robust, light-weight materials such as titanium alloys which were not obtainable in earlier days.
