The United States man of scientific discipline, Benjamin Franklin, who persevered both myopia as well as presbyopia, devised bifocal reading glasses in 1784 to obviate having to often switch betwixt 2 frames of eyeglasses.

The original lenses designed for rectifying astigmia were distributed by the British astronomy expert George Airy in 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 bridge of the nose. Girolamo Savonarola noted that oculars could be kept in place with a ribbon passed 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 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 twentieth century, Moritz von Rohr at Zeiss made the Zeiss Punktal spherical point-focus lens system which controlled the eyeglass lens domain for many years.

Despite the rising fame of contacts and laser restorative eye surgery, spectacles stay rather 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 bi-focal sunglasses.

Most of these modern contraptions are also distinctly better able to resist the rigors of day-to-day wear as well as the occasional accident. Contemporary frames are likewise ofttimes constructed from solid, light-weight materials like titanium alloys which were not available in earlier times.