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Orthokeratology and bi-focal contact lens

  • US 20050105046A1
  • Filed: 12/27/2004
  • Published: 05/19/2005
  • Est. Priority Date: 11/17/2000
  • Status: Active Grant
First Claim
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1. An orthokeratology contact lens for a patient'"'"'s cornea, comprising:

  • an optical zone (20) having a curvature defined by a base curve (30);

    a plateau zone (22) coupled to said optical zone and extending radially therefrom, said plateau zone having a curvature defined by a plateau curve (34), said plateau curve being flatter than said base curve (30);

    a fitting zone (24) coupled to said plateau zone and extending radially therefrom, said fitting zone having a curvature defined by a fitting curve (36), said fitting curve being steeper than said plateau curve;

    an alignment zone (26) coupled to said fitting zone and extending radially therefrom, said alignment zone having a curvature defined by an alignment curve (38), said alignment curve being flatter than said fitting curve;

    a peripheral zone (28) coupled to said alignment zone and extending radially therefrom, said peripheral zone having a curvature defined by a peripheral curve (42), said peripheral zone forming an edge lift to act as tear reservoir.

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