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Class Information
Number: 351/161
Name: Optics: eye examining, vision testing and correcting > Spectacles and eyeglasses > Ophthalmic lenses or blanks > Eye contact type > Multifocal
Description: Subject matter wherein the contact lens comprises two zones of different focal length, one zone to correct the distance vision and another zone to correct the reading vision.










Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
5153778 Powerless field-corrective lens Oct. 6, 1992
5151723 Multifocal contact lens Sep. 29, 1992
5144483 Diffractive multifocal optical device Sep. 1, 1992
5142411 Multifocal birefringent lens system Aug. 25, 1992
5141301 Soft bifocal contact lens Aug. 25, 1992
5139519 Multi-focal intra-ocular lens Aug. 18, 1992
5139325 Wide depth of focus power add to intraocular and contact lenses Aug. 18, 1992
5129718 Multi-focal diffractive ophthalmic lenses Jul. 14, 1992
5125729 Multifocal contact lens Jun. 30, 1992
5121980 Small aperture multifocal Jun. 16, 1992
5121979 Diffractive multifocal optical device Jun. 16, 1992
5120120 Multifocal optical device with spurious order suppression and method for manufacture of same Jun. 9, 1992
5117306 Diffraction bifocal with adjusted chromaticity May. 26, 1992
5116111 Multi-focal diffractive ophthalmic lenses May. 26, 1992
5114220 Multiple contour diffractive lens May. 19, 1992
5112351 Multifocal intraocular lenses May. 12, 1992
5108169 Contact lens bifocal with switch Apr. 28, 1992
5106180 Multifocal ophthalmic lens Apr. 21, 1992
5104212 Diffractive contact lens in relief Apr. 14, 1992
5100226 Diffractive ophthalmic lens for correcting astigmatism Mar. 31, 1992
5100225 Contact lens having position stabilization Mar. 31, 1992
5096285 Multifocal multizone diffractive ophthalmic lenses Mar. 17, 1992
5089024 Multi-focal intraocular lens Feb. 18, 1992
5080472 Multifocal optical lens Jan. 14, 1992
5076683 Spuncast compound contact lens Dec. 31, 1991
5076684 Multi-focal diffractive ophthalmic lenses Dec. 31, 1991
5073021 Bifocal ophthalmic lens constructed from birefringent material Dec. 17, 1991
5071244 Soft bifocal contact lens Dec. 10, 1991
5066301 Variable focus lens Nov. 19, 1991
5056908 Optic zone phase channels Oct. 15, 1991
5054905 Progressive intensity phase bifocal Oct. 8, 1991
5050981 Lens design method and resulting aspheric lens Sep. 24, 1991
5044743 Corrective lens system Sep. 3, 1991
5044742 Contact lens Sep. 3, 1991
5024517 Monovision corneal contact lenses Jun. 18, 1991
5020898 Contact lens for correction of astigmatism Jun. 4, 1991
5019098 Sight-correcting optical component such as an intra-ocular implant or contact lens May. 28, 1991
5017000 Multifocals using phase shifting May. 21, 1991
5009497 Contact lenses utilizing keel orientation Apr. 23, 1991
5008102 Biocompatible intraocular light-screening compositions and methods of intraocular light screening Apr. 16, 1991
5002382 Multifocal corneal contact lenses Mar. 26, 1991
4995714 Multifocal optical device with novel phase zone plate and method for making Feb. 26, 1991
4995715 Diffractive multifocal optical device Feb. 26, 1991
4994080 Optical lens having at least one stenopaeic opening located in the central area thereof Feb. 19, 1991
4981342 Multifocal birefringent lens system Jan. 1, 1991
4976534 Simultaneous vision optical lens for correcting presbyopia Dec. 11, 1990
4971432 Bifocal contact lens Nov. 20, 1990
4938583 Contact lens and method of making same Jul. 3, 1990
4936672 Multifocal contact lens Jun. 26, 1990
4923296 Oriented simultaneous vision bifocal contact lenses or the like utilizing introaocular suppression of blur May. 8, 1990

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