Best form lenses for near vision - an innovation - 1 interactive CET point
12:00 - 13:00
With the advent of free form manufacturing technology it has become possible to correct off-axis aberrations of spectacle lenses to a far more accurate degree. This talk describes the difference between the aberrations exhibited by a lens in distance and near vision. It describes the methods by which the usual best form lens for distance vision can be modified to fully correct the aberrations in near vision and an exciting new design which has combined both corrections in a single lens.
Spectacle lens aberrations
Difference between form of lenses for distance and near vision.
Aberration correction by means of aspherical surfaces
New lens designs offering best form performance in both the distance and the near portions of the lens.
Author and internationally renowned optician, scholar and lens designer. Professor Jalie also has an honorary degree of DSc for his services to Ulster Optometry/Health.
Professor M Jalie SMSA, FBDO(Hons) SLD, DSc, Hon FCGI, Hon FCOptom, MCMI is Visiting Professor in Optometry to the optometry course at Ulster University in the UK. He also works as a consultant to the ophthalmic industry. He was the Head of Department of Applied Optics at City & Islington College from 1986 to 1995 where he had taught optics, ophthalmic lenses and dispensing from 1964. He is recognised as an international authority on the design of spectacle lenses and has written several books including Principles of Ophthalmic Lenses, first published in 1967 and now in its fifth edition, which is recognised as a standard text on the subject and has been translated into Mandarin. His most recent book, Ophthalmic Lenses & Dispensing (3rd Edition 2004), has been translated into Russian. He is the author of some 200 papers on ophthalmic lenses, contact lenses, intra-ocular lenses and dispensing. He holds patents for aspheric spectacle lenses and intra-ocular lenses. He has also produced several educational CDs and runs a web-based course in Spectacle Lens Design leading to the qualification FBDO(Hons) SLD.