Multifocal phase place
Aniseikonia eyeglass lens with progressive magnification
Multifocal contact lenses utilizing diffraction and refraction
Progressive multi-focal ophthalmic lens
Diffractive multi-focal lens Patent #: 5760871
ApplicationNo. 334067 filed on 06/16/1999
US Classes:351/169, Gradually varying focal power351/161Multifocal
ExaminersPrimary: Sugarman, Scott J.
Attorney, Agent or Firm
Foreign Patent References
International ClassesG02C 007/06
Foreign Application Priority Data1998-06-18 IL
AbstractA multifocal lens having far and near vision zones is presented. The lens comprises a substrate in the form of a progressive addition lens and a modulation formed on a surface of the substrate. The substrate lens has far and near vision zones, selected in accordance with respective prescribed values of optical power required for the patient's eye at his distance and reading vision, and an intermediate transition region between the far and near vision zones. The modulation is of kind producing locally variable power addition such that the far and near vision zones of the multifocal lens are wider than the far and near vision zones of the substrate.