Dr. Richard S. Skipper Profile

Dr. Richard S. Skipper

CEO at Polymer Sciences Ltd

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Proceedings Article | 19 August 2005 Paper

A new approach to producing optical (contact) lenses

Richard Skipper, Ian Spencer

Proceedings Volume 5872, 58720G (2005) https://doi.org/10.1117/12.614148

KEYWORDS: Lenses, Polymers, Manufacturing, Contact lenses, Optics manufacturing, Eye, Tolerancing, Inspection, Patents, Polymethylmethacrylate

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The rapid and impressive growth of China has been achieved on the back of highly labour intensive industries, often in manufacturing, and at the cost of companies and jobs in Europe and America. Approaches that worked well in the 1990's to reduce production costs in the developed countries are no longer effective when confronted with the low labour costs of China and India. We have looked at contact lenses as a product that has become highly available to consumers here but as an industry that has reduced costs by moving to low labour cost countries. The question to be answered was, "Do we have the skill to still make the product in the UK, and can we make it cheap enough to export to China?" if we do not, then contact lens manufacture will move to China sooner or later. The challenge to enter the markets of the BRIC (Brazil, Russia, India and China) countries is extremely exciting as here is the new money, high growth and here is a product that sells to those with disposable incomes. To succeed we knew we had to be radical in our approach; the radical step was very simple: to devise a process in which each step added value to the customer and not cost to the product. The presentation examines the processes used by the major producers and how, by applying good manufacturing practice sound scientific principles to them, the opportunity to design a new low cost patented process was identified.

Proceedings Article | 1 December 1991 Paper

Moulding process for contact lens

Richard Skipper, David Shepherd

Proceedings Volume 1529, (1991) https://doi.org/10.1117/12.50477

KEYWORDS: Polishing, Polymers, Lens design, Polymerization, Surface finishing, Contact lenses, Laser induced plasma spectroscopy, Cornea, Liquids, Manufacturing

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Cast molding of contact lenses from a polymerizable monomer composition, encapsulated between two molds, offers a route to a highly reproducible product. Unfortunately, some of the reproducible characteristics are not desirable. In particular, the edge profile is often uneven and causes patient discomfort, or worse. To ensure a good quality edge with current molding processes, it is necessary to polish it. In the polishing steps the final edge profile can vary, but in addition other faults such as scratches and tears, not to mention general handling faults, depress yields and reduce the quality of a perfectly molded lens. This paper describes a process which not only produces a uniform, safe, and comfortable edge but which, by SPC methods, reduces all handling to a minimum and ensures the patient receives a healthy lens of consistently high quality.

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