Molds for making contact lenses
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United States of America Patent
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Jan 9, 2018
Grant Date -
Jun 25, 2015
app pub date -
Dec 18, 2014
filing date -
Dec 20, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention general related to a reusable mold for making a contact lens comprises a first mold half having a first mold surface in contact with a polymerizable and/or crosslinkable silicone containing lens forming composition and a second mold half having a second mold surface in contact with the lens-forming composition, and the first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface. The cavity defines the shape of a contact lens to be molded. The reusable mold has at least one of the mold halves being made from an oxide glass comprising fluorine and/or fluoride. The mold made by oxide glass comprising fluorine and/or fluoride demonstrates improving mold cleanability with water based cleaning process.
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