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Systems and methods for producing contact lenses from a polymerizable composition

  • US 8,308,999 B2
  • Filed: 05/21/2010
  • Issued: 11/13/2012
  • Est. Priority Date: 08/09/2005
  • Status: Active Grant
First Claim
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1. A method for producing soft contact lenses from a polymerizable composition, the method comprising:

  • providing a carrier carrying a plurality of contact lens mold assemblies each comprising a first mold section and a second mold section forming a contact lens shaped cavity therebetween, wherein each contact lens mold assembly contains a polymerizable composition comprising a hydrogel contact lens polymerizable composition in the contact lens shaped cavity;

    providing a chamber containing a UV light source comprising a plurality of UV lamps providing UV light to the chamber effective to facilitate polymerization of the polymerizable composition;

    exposing the contact lens mold assemblies in the carrier to the UV light in the chamber at conditions effective to polymerize the polymerizable composition and form a hydrogel contact lens; and

    during the step of exposing, using digital addressable lighting interface (DALI) protocol-based technology in performing (A) monitoring the plurality of UV lamps and identifying a UV lamp which fails to operate and (B) controlling the consistency of light intensity provided by the plurality of UV lamps.

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