Univis bifocal handbooks
 Catalogue Number: 1862 Univis bifocal handbooks Category: Book Sub-Category: Product catalogue Time Period: 1940 to 1999 Place Of Publication/Manufacture: London Dayton USA Publisher/Manufacturer: United Kingdom Optical Co Ltd, The Univis Lens Company Description Of Item: Three product brochures for Univis bifocals: (A) The story of British Achievement Univis Bifocals. Published by the United Kingdom Optical Co Ltd Mill Hill London mid 1940s, quarto size, light brown card cover, 16 pages, numerous illustrations, small single fold leaflet giving 10 reasons for Univis Bifocals and a post card to request promotional materials tipped in at back, (B) Univis Presbyopic Prescription Handbook. Published by The Univis Lens Company Dayton Ohio mid 1950s, quarto size, red card cover, 35 pages, numerous illustrations, (C) Prescription and fitting handbook Continuous vision lenses. Published by the United Kingdom Optical Co Ltd Mill Hill London mid 1950s, quarto size, yellow card cover, 21 pages, numerous illustrations Historical Significance: London optician, F Bruce Watson, developed the prototype of a flat top bifocal in the middle 1920s. They were 'born' at the factory of the United Optical Company at Mill Hill in London. Arrangements were made in 1926 for the lenses to be made and marketed in the USA by The Univis Lens Company at Dayton Ohio. The lenses were made in various forms, a narrow ribbon flat top segment, a flat top 22mm segment, a trifocal and a lenticular flat top bifocal. Trifocals were marketed as 'Continuous Vision Lenses'. Brochure A contains a short history and all three brochures illustrate various devices for accurate fitting. Brochure B features various lenticular designs for correction of aphakia. How Acquired: Ex Nathan Library Condition: Good Location: Archive office. Pamphlet and ephemera filing cabinet. Drawer 4 |