Patents by Inventor Daoud R. Iskander

Daoud R. Iskander has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for measuring wavefront aberrations
    Patent number: 6880933
    Abstract: An apparatus and method for measuring wavefront aberrations. The apparatus comprises a reflecting device for reflecting selected portions of the wavefront, an imaging device for capturing information related to the selected portions, and a processor for calculating aberrations of the wavefront from the captured information. The method comprises reflecting selected portions of a wavefront onto the imaging device, capturing information related to the selected portions, and processing the captured information to derive the aberrations.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: April 19, 2005
    Assignee: Johnson & Johnson Vision Cars, Inc.
    Inventors: Brett A. Davis, Michael J. Collins, Daoud R. Iskander, Jeffrey H. Roffman, Denwood F. Ross, III
  • Methods for designing multifocal ophthalmic lenses
    Patent number: 6709103
    Abstract: The invention provides methods for designing lenses useful for correcting presbyopia that permits variation of the speed of the power change from distance to near vision power or near to distance vision power. The rate of change may be symmetrical around the midpoint or faster or slower on either side of the midpoint.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: March 23, 2004
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Jeffrey H. Roffman, Daoud R. Iskander, Brett A. Davis, Michael J. Collins
  • Method and apparatus for measuring wavefront aberrations
    Publication number: 20040004696
    Abstract: An apparatus and method for measuring wavefront aberrations. The apparatus comprises a reflecting device for reflecting selected portions of the wavefront, an imaging device for capturing information related to the selected portions, and a processor for calculating aberrations of the wavefront from the captured information. The method comprises reflecting selected portions of a wavefront onto the imaging device, capturing information related to the selected portions, and processing the captured information to derive the aberrations.
    Type: Application
    Filed: June 26, 2003
    Publication date: January 8, 2004
    Inventors: Brett A. Davis, Michael J. Collins, Daoud R. Iskander, Jeffrey H. Roffman, Denwood F. Ross
  • Method and apparatus for measuring wavefront aberrations
    Patent number: 6616279
    Abstract: An apparatus and method for measuring wavefront aberrations. The apparatus comprises a reflecting device for reflecting selected portions of the wavefront, an imaging device for capturing information related to the selected portions, and a processor for calculating aberrations of the wavefront from the captured information. The method comprises reflecting selected portions of a wavefront onto the imaging device, capturing information related to the selected portions, and processing the captured information to derive the aberrations.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: September 9, 2003
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Brett A. Davis, Michael J. Collins, Daoud R. Iskander, Jeffrey H. Roffman, Denwood F. Ross, III
  • Methods for designing contact lenses
    Patent number: 6554427
    Abstract: The invention provides a method for designing lenses and lenses produced thereby in which method locally fitted Chebyshev polynomials are used to design one or more of the lens' surfaces.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: April 29, 2003
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Brett A. Davis, Jeffrey H. Roffman, Michael J. Collins, Daoud R. Iskander
  • Design of a soft contact lens based upon novel methods of corneal topographic analysis
    Patent number: 6511179
    Abstract: A method is provided which is used to design soft contact lens via corneal topographic analysis. The topography of the cornea is matched to a corresponding topography of a soft contact lens. A geometrical transformation which maps the corneal elevation onto the back surface of an unflexed soft contact lens is used to minimize errors induced by flexure of the lens. The mapping transformation takes into account the effects of flexure. As a result, the contact lens has a back surface with a curvature which matches the specific elevations of the cornea, while the front surface can be spherical or any desired symmetrical or asymmetrical shape.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: January 28, 2003
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Brett A. Davis, Michael J. Collins, Jeffrey H. Roffman, Daoud R. Iskander, Denwood F. Ross, III