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Contact lens

  • US 7,699,465 B2
  • Filed: 04/12/2007
  • Issued: 04/20/2010
  • Est. Priority Date: 04/12/2006
  • Status: Expired due to Fees
First Claim
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1. A contact lens, comprising:

  • material forming a lens of suitable size to fit a person'"'"'s eye and extend over at least a portion of the sclera of the person'"'"'s eye;

    the lens having an optical zone, a peripheral zone and a sagittal depth control zone between the optical zone and the peripheral zone;

    the sagittal depth control zone being configured to raise the optical zone above the level of a person'"'"'s eye when the lens is in use and create a tear layer between the optical zone and the person'"'"'s eye; and

    tear flow control features in the sagittal depth control zone, the tear flow control features comprising ports that penetrate through the material of the lens, the ports being elongated to form slots, and the slots being oriented to slant nasally as the slots extend radially outward.

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