Fabrication of an intraocular lens
AssigneePharmacia & Upjohn Company
InventorLarry W. Blake
Life of this patent
Estimating the term…
Abstract
A lens, having an optical power surface, which may have multiple radii portions or aspherical portions as well as spherical portions, is molded in a coined old. A pair of core pins, positioned within the mold cavity during the lens forming process, will produce a pair of haptic-mounting holes within the lens. As the lenses are subsequently tumbled to remove flash, indentations will form adjacent to the haptic-mounting holes. These indentations allow for tangential attachment of the haptic to the lens which, in turn, enables maximum flexibility without exceeding the width of the optic.
Claims54
A method of forming an intraocular lens, comprising the steps of:
- providing an optical mold cavity within a mold;
- positioning a pair of core pins above said mold cavity;
- introducing material for forming said intraocular lens into said mold cavity;
- curing said lens material to form an optical element, wherein said lens material cures around said core pins and does not significantly adhere thereto;
- removing said core pins to form haptic-mounting holes wherein said holes are tangential to an edge of said optical element and an inner surface of said holes is coated with a thin layer of fumed silicone dioxide after tumbling;
- tumble polishing said optical element in a tumbler, to radius or polish said edge of said optical element and to abrade away any flash present on said optical element;
- and
- adhesively bonding a haptic within each of said holes.
A method of forming an intraocular lens, comprising the steps of:
- fabricating an optical element;
- and
- thereafter adhesively bonding haptics to said optical element, wherein said haptics are surface treated before insertion with a corona discharge to improve the adhesive properties thereof.
A method of incorporating a haptic into a soft intraocular lens comprising the steps of:
- surface charging an end of said haptic so as to improve the adhesive properties thereof without forming a mechanical lock on said haptic;
- coating said surface charged end with a primer;
- and
- adhesively bonding said haptic to said intraocular lens.
A method of incorporating a haptic into a soft intraocular lens comprising the steps of:
- surface charging said haptic with a corona discharge;
- and
- bonding said unkeyed haptic to said lens.
A method of making a soft intraocular lens comprising the steps of:
- molding said lens;
- tumble polishing said lens;
- and thereafter
- adhesively bonding unkeyed haptics to said lens.
A method of making a soft lens comprising the steps of:
- swelling said lens in a medium;
- and
- thereafter bonding unkeyed haptics into said lens.
A method of making a soft lens comprising the steps of:
- extracting impurities from said lens;
- and
- thereafter bonding unkeyed haptics into said lens.
A method of incorporating an unkeyed haptic into a soft intraocular lens comprising the steps of:
- extracting said lens;
- and
- thereafter bonding said unkeyed haptic into said lens.
A method of incorporating a haptic into an intraocular lens comprising the steps of:
- surface charging said haptic with a corona discharge;
- and
- bonding said haptic to said lens.
A method of forming an intraocular lens, comprising the steps of:
- fabricating a soft intraocular lens optical element;
- and
- thereafter adhesively bonding at least one unkeyed haptic to said soft optical element.
A method of making an intraocular lens comprising:
- exposing the lens bonding region of a haptic to an ionic discharge selected from the group consisting of corona discharge and plasma at conditions effective to enhance the bond strength between said lens bonding region and said optic relative to a substantially identical haptic not exposed to said ionic discharge;
- and
- then bonding said haptic to said optic.
A method of making an intraocular lens comprising:
- exposing the lens bonding region of a haptic to an ionic discharge at conditions effective to enhance the bond strength between said lens bonding region and said optic relative to a substantially identical haptic having substantially the identical shape but not exposed to said ionic discharge;
- and
- then bonding said haptic to said optic.
A method of incorporating a haptic into a soft intraocular lens, comprising the steps of:
- surface charging an end of said haptic so as to improve the adhesive properties thereof without forming a mechanical lock on said haptic;
- and
- adhesively bonding said haptic to said intraocular lens.
A method of incorporating a haptic into a soft intraocular lens comprising the steps of:
- surface charging an end of said haptic so as to improve the adhesive properties thereof without forming a mechanical lock on said haptic;
- coating said surface charged end with a silicone primer;
- and
- adhesively bonding said haptic to said intraocular lens.
A method of incorporating a haptic into an intraocular lens comprising the steps of:
- surface charging an end of said haptic so as to improve the adhesive properties thereof;
- coating said surface charged end with a primer;
- and
- bonding said haptic to said intraocular lens, wherein said primer-coated end of said haptic is dusted with fumed silicon dioxide prior to said bonding step.
An intraocular lens comprising:
- an optic;
- and
- at least one haptic including a lens bonding region bonded to said optic, wherein said lens bonding region is exposed to an corona discharge prior to being bonded to said optic, and the bond strength between said optic is increased as a result of said exposure relative to a substantially identical intraocular lens including a haptic the lens bonding region of which is not subjected to said exposure.
An intraocular lens comprising:
- an optic;
- and
- at least one haptic including a lens bonding region the surface of which has been treated by being exposed to an corona discharge at conditions effective to increase the bond strength between said optic and said haptic relative to a substantially identical intraocular lens including a haptic the lens bonding region of which is not subjected to said exposure.
An intraocular lens comprising:
- an optic;
- and
- at least one haptic including a lens bonding region bonded to said optic, wherein said lens bonding region is exposed to corona discharge or to plasma prior to being bonded to said optic, and the bond strength between said haptic and said optic is increased as a result of said exposure relative to a substantially identical intraocular lens including a haptic the lens bonding region of which is not subjected to said exposure.
An intraocular lens comprising:
- an optic;
- and
- at least one haptic including a lens bonding region bonded to said optic, wherein said lens bonding region is exposed to ionic discharge prior to being bonded to said optic, and the bond strength between said haptic and said optic is increased as a result of said exposure relative to a substantially identical intraocular lens including a haptic the lens bonding region of which has substantially the identical shape but is not subjected to said exposure.
Dependencies are inferred from the claim text.