Excerpt from Ophthalmic Lenses and Accessories: Lenses, Frames, Magnifiers and Readers The works Bausch & Lomb Optical Company are located in the City of Rochester, State of New York, and cover on the St. Paul Street tract a floor space of about ten acres, with additional buildings occupying a land area of about nine acres on the river flats. The former buildings include the executive offices and main manufacturing plant, while those on the latter site are chiefly devoted to the moulding of optical glass into suitable forms, preparatory to grinding. The buildings themselves are designed to meet all requirements for the delicate operations involved in optical and mechanical works of precision. The rooms are large and airy, well lighted and heated by a modern blower system with a water cooling device which insures pure air of proper humidity. The plant is also provided with refrigerating machinery, and all machines and buildings are exceptionally well safeguarded for the protection of life and property. The equipment for the manufacture of the varied lines of optical instruments is of the most modern types known to mechanics. Much of the machinery is designed and constructed by our own experts in our own plant and is the result of an experience of more than sixty years of optical and mechanical endeavor. Owing to the technical character of the industry, all devices undergo constant supervision and inspection in order to maintain the equipment at its highest point of efficiency. The organization comprises a force of approximately 2,500 employees thoroughly trained in their respective branches. From the computations of the Scientific and Technical Bureaus, through to the intricate mechanical operations, each progressive step is marked by a systematic control until the product reaches final inspection, when our trade mark guarantees the Bausch & Lomb standard of quality. In addition to the executive offices at Rochester, N. Y., branch offices are maintained and other representatives established in different large commercial centers to provide adequate distribution for our products, not only in America but for the markets of England and her colonies, throughout the continent of Europe and in parts of Asia. The addresses of the different branches follow: New York: 200 Fifth Avenue. Washington: 613 Fifteenth Street, N. W. Chicago: 122 S. Michigan Boulevard. San Francisco: 154 Sutter Street. Frankfurt a. M.: G. M. B. H. 30 Schillerstrasse. London: 37-38, Hatton Garden, E. C. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Both opticians and optometrists are trained to grind and polish lenses and then to take the surfaced lens and finish it by centering it optically and grinding the edges so that the lens fits in the shape of the chosen frame. Thoroughly revised and updated with seven new chapters to cover changes in the industry, this 2nd edition provides a step-by-step understanding of lens finishing for the optometrist or optician. Content has been completely updated, reorganized and expanded to include the most recent industry changes. Updated photos illustrate the most current types of lenses and enhance comprehension of lens finishing. Seven new chapters cover rimless and semi rimless frames; environmental and safety concerns; lens insertion and standard alignment; nylon cord and other groove mountings; lens tinting and engraving; progressive addition lenses; and lens impact and resistance testing. An appendix of specific British Standards allows the book to easily travel to the UK and other countries that fashion their dispensing programs after the UK model. The Lens Centration Skills Series provides exercises to practice lens finishing and reinforce material from the text.