The American gentleman of science, Benjamin Franklin, who endured both nearsightedness as well as presbyopia, invented bifocals in 1784 to obviate needing to frequently switch betwixt two pairs of glasses.

The 1st lenses intended for correcting astigmia were constructed by the British stargazer George Airy within 1825.

In the history of bifocal reading glasses, the building of pectacle frames also evolved. Early on oculars were designed to be either kept in place with your hand or by maintaining force on the nose. Girolamo Savonarola advised that eyeglass lenses could be held in place with a ribbon passed over the subject’s head, which in turn was held secure by the weight of one’s hat.

Entering modern bifocal history, the contemporary fashion of bi focal 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 produced the Zeiss Punktal spherical point-focus lens system which dominated the eyeglass lens domain for many years.

Despite the rising fame of contacts and laser restorative eye surgery, spectacles remain rather popular, 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 designs are also distinctly better capable of resisting the challenges of day-to-day wear and tear and the periodic accident. Contemporary frames are likewise ofttimes constructed from robust, light-weight materials like titanium alloys that weren’t obtainable in earlier times.

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