Apparatus and method for injection molding an intraocular lens device
AssigneeBausch & Lomb Incorporated
InventorsAnita Graney, Graham Biddle, Thomas Lodadio, William Appleton
Life of this patent
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Abstract
Apparatus and methods for injection molding intraocular lenses includes an embodiment having first and second runners extending into first and second optic cavities of a mold configured to make a dual optic lens device.
Claims82
Apparatus for injection molding an intraocular lens having first and second optics, said apparatus comprising:
- a) a first optic cavity for forming said first optic;
- b) a second optic cavity for forming said second optic;
- c) a first sub-runner in fluid communication with said first optic cavity;
- and
- d) a second sub-runner in fluid communication with said second optic cavity.
A liquid injection molding apparatus for molding an intraocular lens having at least one optic, said apparatus comprising;
- a) first and second cavity blocks having first and second optical surface formed therein and in facing relation to one another when said cavity blocks are in contacting relation, said fist and second optical surface forming an optic cavity therebetween;
- b) a runner formed in at least one of said cavity blocks for injecting a quantity of liquid lens material into said optic cavity;
- and
- c) a tapered gate located between said runner and said first and second optical surfaces, said gate having a taper of between about 5 and 25 degrees.
A mold insert making an intraocular lens, said mold insert including a tool insert and an annular ring removably and concentrically attached to one another.
A method for injection molding an intraocular lens having first and second optics, said method comprising the steps of:
- a) providing a first optic cavity for forming said first optic;
- b) providing a second optic cavity for forming said second optic;
- c) providing a first runner in fluid communication with said first optic cavity;
- and
- d) providing a second runner in fluid communication with said second optic cavity.
An intraocular lens having at least first and second optics interconnected by at least one haptic having a frosted surface finish whereby said at least one haptic is visually distinguishable from said at least first and second optics during implantation of said lens into an eye.
The intraocular lens of claim 477 wherein said three haptics each have a surface finish of about Ra 0.15 to 1.25μ.
Dependencies are inferred from the claim text.