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,
Daniel Lascelles (1714–1784) in the firm of Lascelles and Maxwell, sugar factors, of Mark Lane, London; which, following the death of George Maxwell in 1763 became Lascelles Clarke and Daling. Daniel married Elizabeth Southwick from whom he was divorced in 1751. He had no legitimate children. He died in Pall Mall London 24 May 1784. Daniel Lascelles (1714–1784) Daniel Lascelles (1714–1784) was an plantation owner, merchant and politician who sat in the British House of Commons from 1752 to 1780. Born in Barbados and baptised at St Michael's, 20 May 1714 he resided at Goldsborough Hall near Knaresborough Yorkshire which estate he purchased