Patents by Inventor Karan Aggarwala

Karan Aggarwala 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).

  • Apparatus and method for subjective determination of the refractive error of the eye
    Patent number: 7963654
    Abstract: The invention provides for a subjective refractor for determining refractive error of the eye comprising an optical system for presenting at least two targets to the eye, the difference of focus between the targets greater than the predicted depth of focus of the eye; —means for indicating target preference from the presented targets; and means for determining refractive error of the eye on the basis of target preference.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: June 21, 2011
    Inventor: Karan Aggarwala
  • APPARATUS AND METHOD FOR SUBJECTIVE DETERMINATION OF THE REFRACTIVE ERROR OF THE EYE
    Publication number: 20100007850
    Abstract: The invention provides for a subjective refractor for determining refractive error of the eye comprising an optical system for presenting at least two targets to the eye, the difference of focus between the targets greater than the predicted depth of focus of the eye; —means for indicating target preference from the presented targets; and means for determining refractive error of the eye on the basis of target preference.
    Type: Application
    Filed: October 16, 2007
    Publication date: January 14, 2010
    Inventor: Karan Aggarwala