Optician more important and dignified. Far-sighted or aging colonial Americans imported spectacles from Europe. Spectacles were primarily for the affluent and literate colonists, who required a valuable and precious appliance. Benjamin Franklin in the 1780s developed the bifocal. Bifocal lenses advanced little in the first half of the 19th century. The terms bifocal and trifocal were introduced in London by John Isaac Hawkins, whose trifocals were patented in 1827. In 1884 B. M. Hanna was granted patents on two forms of bifocals which become commercially standardized as the "cemented" and "perfection" bifocals. Both had the serious faults of ugly appearance, fragility,
Spectacles (product) 26, 2018, a second-generation of the Spectacles launched in 17 countries. This version included both software and hardware updates including water resistance functionality and increased storage. On September 5th, 2018, two improved second-generation Spectacles were released. The two new versions, dubbed Nico and Veronica, included major design changes that reflect more typical sunglasses styles. In December 2014 Snap Inc., then Snapchat Inc., acquired Vergence Labs, the developers of the Epiphany Eyewear smartglasses. Epiphany Eyewear, which recorded wide-angle point-of-view videos, had been positioned as Vergence's first step toward eventually building biometrically-controlled augmented reality glasses which they hoped would someday "give people