Patents Represented by Attorney, Agent or Law Firm Stort, Uxa, Buyan & Mullins
  • Patent number: 6221105
    Abstract: A multifocal ophthalmic lens, having outer annular zones with vision correction powers less than a far vision correction power of the patient, is disclosed. These additional annular zones come into play, when the pupil size increases under dim lighting conditions, to thereby compensate for the near-vision powered annular zones. The net effect of the additional near vision annular zones and the additional annular zones having power less than the far vision correction power is to shift the best quality image from in front of the retina to an area on the retina of the eye, to thereby reduce halo effects and improve image contrast.
    Type: Grant
    Filed: December 28, 1998
    Date of Patent: April 24, 2001
    Assignee: Allergan
    Inventor: Valdemar Portney