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Iontophoretic contact lens

  • US 9,937,074 B2
  • Filed: 01/22/2016
  • Issued: 04/10/2018
  • Est. Priority Date: 01/22/2015
  • Status: Active Grant
First Claim
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1. A contact lens for ocular therapy, comprising:

  • a reservoir containing a charged therapeutic composition;

    a current source providing iontophoretic current to the charged therapeutic composition to affect delivery of the charged therapeutic composition into an eyeball;

    a sensing circuit controlling the current source to maintain a selected pH range of the charged therapeutic composition; and

    a polarity selective barrier region disposed at a perimeter of the reservoir and having a polarity the same as that of the charged composition in the corresponding reservoir.

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