Systems and methods for producing contact lenses from a polymerizable composition
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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Abstract
Methods for producing contact lenses from a polymerizable composition are provided. The methods generally include providing a carrier carrying a plurality of molds each of which contains a polymerizable composition. A chamber is provided which contains a light source providing light to the chamber effective to facilitate polymerization of the polymerizable composition. The molds in the carrier are exposed to the light in the chamber. During this exposing, the light source is monitored, for example, using digital addressable lighting interface (DALI) technology.
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Citations
19 Claims
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1. A method for producing soft contact lenses from a polymerizable composition, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification