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,
John Hanbury (1744–1784) John Hanbury (1744–1784) John Hanbury (6 August 1744 – 6 April 1784) was a British heir and politician who sat in the House of Commons from 1766 to 1784. John Hanbury was born in 1744. His father, Capel Hanbury served as the Member of Parliament for Leominster. His mother was Jane Tracy. His paternal grandfather was John Hanbury , while his maternal grandfather was Thomas Tracy, 5th Viscount Tracy. His great grandfather Capel Hanbury (1625–1704) began the building of Pontypool Park House in 1659, where he grew up at Pontypool Park in Wales. His family was responsible for the industrialisation