Methods for improving the hydrophilicity of contact lenses and contact lenses having the same
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United States of America Patent
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Feb 12, 2008
Grant Date -
May 3, 2007
app pub date -
Nov 1, 2005
filing date -
Nov 1, 2005
priority date (Note) -
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Abstract
The present invention relates to contact lenses manufactured using a gas permeable material with improved hydrophilicity. A method for improving the hydrophilicity of the contact lens includes providing a contact lens comprising a gas permeable contact lens material and exposing the material to a treatment solution comprising a chemical agent under conditions that are effective to significantly reduce the contact angle of the contact lens for a period of at least about two months. In another embodiment, the method includes irradiating the contact lens to sterilize the contact lens material. A contact lens manufactured using this method includes a substantially rigid portion comprising a polymeric material, the polymeric material comprising a hydrophilic surface having a contact angle of about 65 degrees or less.
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