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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
5532768 Contact lens Jul. 2, 1996
5528321 Method of manufacturing contact lenses Jun. 18, 1996
5526071 Multifocal contact lens and method for preparing Jun. 11, 1996
5521656 Method of making an ophthalmic lens May. 28, 1996
5517260 Ophthalmic lens having a progressive multifocal zone and method of manufacturing same May. 14, 1996
5517259 Method of manufacturing toric single vision, spherical or aspheric bifocal, multifocal or progressive contact lenses May. 14, 1996
5502517 Soft contact lens with a back surface whose central and intermediate portions are formed by different ellipsoidal surfaces continuously contiguous to each other Mar. 26, 1996
5502518 Asymmetric aspheric contact lens Mar. 26, 1996
5500695 Toric lens with orientation wave forms Mar. 19, 1996
5493350 Multipocal contact lens and method for preparing Feb. 20, 1996
5485228 Multifocal ophthalmic lens pair Jan. 16, 1996
5483304 Multifocal contact lens Jan. 9, 1996
5455641 Soft contact lens having toric rear face and rotationally symmetrical front face Oct. 3, 1995
5448312 Pupil-tuned multifocal ophthalmic lens Sep. 5, 1995
5443507 Intraocular lens set Aug. 22, 1995
5443506 Lens with variable optical properties Aug. 22, 1995
5436678 Aspheric multifocal contact lens Jul. 25, 1995
5430504 Bifocal contact lenses Jul. 4, 1995
5422687 Contact lens wherein central correction region has a center 0.2-2.4mm offset from lens geometric center and a diameter of 0.8-3.5mm Jun. 6, 1995
5410375 Multifocal birefrigent lens with adjusted birefringence Apr. 25, 1995
5408281 Multifocal contact lens Apr. 18, 1995
5406341 Toric single vision, spherical or aspheric bifocal, multifocal or progressive contact lenses and method of manufacturing Apr. 11, 1995
5404183 Multifocal contact lens and method for preparing Apr. 4, 1995
5349396 Clear axis, segmented multifocal ophthalmic lens Sep. 20, 1994
5349394 Rigid gas permeable lenses Sep. 20, 1994
5349395 Multiple focus corneal contact lens and method for treating myopia Sep. 20, 1994
5344447 Diffractive trifocal intra-ocular lens design Sep. 6, 1994
5344448 Multi-focal intra-ocular implant Sep. 6, 1994
5331132 Manufacture of visual lenses Jul. 19, 1994
5296880 Bifocal contact lens Mar. 22, 1994
5270744 Multifocal ophthalmic lens Dec. 14, 1993
5260727 Wide depth of focus intraocular and contact lenses Nov. 9, 1993
5245366 Bifocal contact lens and method of making same Sep. 14, 1993
5245367 Annular mask contact lenses Sep. 14, 1993
5239321 Eyelash supported correcting lens Aug. 24, 1993
5229797 Multifocal diffractive ophthalmic lenses Jul. 20, 1993
5225858 Multifocal ophthalmic lens Jul. 6, 1993
5220359 Lens design method and resulting aspheric lens Jun. 15, 1993
5214453 Progressive eccentricity multifocal contact lens and manufacturing process thereof May. 25, 1993
5198844 Segmented multifocal contact lens Mar. 30, 1993
5192317 Multi focal intra-ocular lens Mar. 9, 1993
5181053 Multi-focal contact lens Jan. 19, 1993
5178636 Tuned Fresnel lens for multifocal intraocular applications including small incision surgeries Jan. 12, 1993
5173723 Aspheric ophthalmic accommodating lens design for intraocular lens and contact lens Dec. 22, 1992
5172143 Artificial optical lens and method of manufacturing it Dec. 15, 1992
5170192 Oxygen permeable bifocal contact lenses and their manufacture Dec. 8, 1992
5166711 Multifocal ophthalmic lens Nov. 24, 1992
5166712 Multifocal ophthalmic lens Nov. 24, 1992
5158572 Multifocal intraocular lens Oct. 27, 1992
5152787 Intraocular gradient-index lenses used in eye implantation Oct. 6, 1992

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