Page 100 - The Indian Optician Digital Edition September-October 2021

Dr Prof Mo Jalie, SMSA, FBDO (Hons), Hon FCGI Hon FCOptom,
MCMI, is a Visiting Professor of Optometry at the University of Ulster in
Coleraine, and at the post-graduate facility at Varilux University. He served
for nine years as Head of Department of Applied Optics at City & Islington
College, where he taught optics, ophthalmic lenses and dispensing. He
is a recognised international authority on spectacle lens design and has
written several books including Principles of Ophthalmic Lenses. His most
recent book, Ophthalmic Lenses & Dispensing was translated into Russian.
He has authored over 200 papers on ophthalmic, contact and intra-ocular
lenses, and on dispensing; and is a consultant editor to The Optician (UK)
and technical editor to The Indian Optician journal. He holds patents for
aspheric spectacle and intra-ocular lenses. Jalie is a past-chairman of the
Academic Committee of the Association of British Dispensing Opticians,
and was the first Chairman of the Faculty of Dispensing Opticians. He is
the ABDO representative on the BSI committees on ophthalmic lenses
and spectacle frames and a past member of the Education Committee
of the General Optical Council. In 1998 Jalie was thrice honoured: he was
made Honorary Fellow of the British College of Optometrists, a Life Fellow
of the Association of British Dispensing Opticians, and in December of
that year he was granted the Max Wiseman Memorial Research Medal.
Dr Prof Mo Jalie
S
SPECTAACLE LENS MAANUUFACTURRING TEECHHNOLOGIES
L
E
Perhaps the most important development in the ophthalmic
lens field during the first two decades of the 21 Century has been
st
the rapid rise in the use of CNC machining techniques in the
THERE IS A GROWING ophthalmic prescription industry. Popularly known as free form,
DEMAND TO MERGE this method of working, enables almost any form of surface to be
VISION CORRECTION produced, provided that the laboratory has access to the software
WITH OTHER WEARABLE necessary to describe and produce the surface during the
TECHNOLOGY. generation procedure. Indeed, the key to free form production is
COMBINING THESE the software that calculates the curves for the individual designs
and drives the machinery to manufacture the lenses. The optimal
PRODUCES SO-CALLED curves are calculated for every possible prescribed power at
SMART GLASSES AND thousands of points on the lens surface resulting in a “point file”

IS A HUGE UNTAPPED that describes, in mathematical terms, the surface of the lens.
OPPORTUNITY FOR This file is ultimately used to drive the production generator and
BOTH CONSUMERS polisher used to manufacture the lens.
AND THE WEARABLE Another, quite different, production process has also
TECHNOLOGY INDUSTRY appeared in the last 10 years and perhaps this form of additive

| SEPT-OCT 2021| 96 LENS TALK