FLUIDIC INTRAOCULAR LENS SYSTEMS AND METHODS
The present invention relates to a fluidic intraocular lens inserted into a capsular bag of an eye to replace a crystalline lens. The fluidic intraocular lens may be shaped by elastic membranes bonded to a support ring. The space inside the device may be filled with optically transparent fluid or gel having an index of refraction greater than the index of vitreous humor. The device may be such designed so that the focusing power of the lens can be changed by the deformation of the capsular bag, which may be subsequently controlled by a ciliary muscle.
1 . A method of manufacturing a fluidic intraocular lens device, the method comprising:
preparing a first optical membrane;
preparing a hollow support ring;
bonding the first optical membrane and the hollow support ring; and
filling at least the hollow supporting ring with fluid.
2 . The method of claim 1 , wherein the preparing a first optical membrane comprises:
spinning PDMS into a silicon wafer at a speed;
creating, based on the spinning, the first optical membrane; and
controlling the speed to achieve a desired thinness of the first optical membrane.
3 . The method of claim 2 , wherein the preparing a first optical membrane further comprises:
applying a silane coating to the silicon wafer; and
forming a PDMS handle layer on the silane-coated silicon wafer.
4 . The method of claim 3 , wherein the preparing a first optical membrane further comprises:
peeling off the PDMS handle layer from the silicon wafer.
5 . The method of claim 1 , wherein the one or more walls of the hollow support ring are at least partially elastic to enable the support ring to be folded or bent.
6 . The method of claim 1 , wherein the preparing a hollow support ring comprises:
pouring PDMS into a mold to create a molded PDMS form;
placing the molded PDMS form in a desiccator;
vacuuming the molded PDMS form to eliminate one or more gas bubbles from the molded PDMS form;
curing the molded PDMS form to create a first cured PDMS object; and
removing the first cured PDMS object.
7 . The method of claim 6 , wherein the preparing a hollow support ring further comprises:
creating one or more holes in one or more areas of the first cured PDMS object.
8 . The method of claim 1 , wherein the preparing a hollow support ring comprises:
creating a second cured PDMS object; and
bonding the first cured PDMS object and the second cured PDMS object to each other to form the hollow support ring.
9 . The method of claim 8 , wherein the bonding to form the hollow support ring comprises:
applying a UV ozone treatment to one or more surface areas of the first and second cured PDMS objects; and
joining the first cured PDMS object and the second cured PDMS object to create at least part of the hollow support ring.
10 . The method of claim 1 , wherein the hollow area inside the hollow support ring forms a reservoir, and wherein the bonding comprises:
bonding a second optical membrane and the hollow support ring, wherein the bonded first optical membrane, the hollow support ring and the second optical membrane form a lens chamber, wherein one or more surface areas of the hollow support ring include one or more holes that allow fluid to pass between the reservoir and the lens chamber.
11 . The method of claim 1 , wherein the filling comprises:
filling the reservoir and the lens chamber with the fluid.
12 . A method of implanting a fluidic intraocular lens into an eye, the method comprising:
inserting the fluidic intraocular lens into the eye.
13 . The method of claim 12 , the method further comprising:
determining the shape of a capsular bag in the eye.
14 . The method of claim 13 , wherein the determining comprises:
determining an equatorial diameter and a thickness of the capsular bag; and
determining one or more surgical characteristics of the capsular bag, including one or more of a tuning range characteristic and a focus characteristic.
15 . The method of claim 12 , the method further comprising:
determining a base power of the fluidic intraocular lens.
16 . The method of claim 15 , wherein the determining comprises:
determining one or more of a cornea curvature of the eye, an axial length of the eye, an anterior chamber depth of the eye, or a focal length of the eye.
17 . The method of claim 12 , wherein the fluidic intraocular lens is in a folded or a bent state.
18 . The method claim 12 , the inserting comprises:
removing a crystalline lens from the eye;
inserting the fluidic intraocular lens into the eye; and
setting the fluidic intraocular lens at a desired position in the eye.
19 . The method of claim 12 , the method further comprising:
determining, after the inserting, a refractive value of the eye; and
removing, based on the determining, the fluidic intraocular lens from the eye; and
inserting a second intraocular lens into the eye.
20 . An intraocular apparatus for implantation in an eye, said apparatus comprising:
a partially elastic ring structure, wherein at least part of the ring structure forms a reservoir;
a first lens membrane;
a second lens membrane, wherein the ring structure, the first lens membrane and the second lens membrane form a lens chamber;
one or more pathways between the reservoir and the lens chamber to enable exchange of fluid between the lens chamber and the reservoir, wherein the fluid is at least partially transparent to visible light and has a refractive index greater than 1.33; and
a pressure mechanism to create a force that causes the fluid in the reservoir to enter the lens chamber, thereby causing a shape of the first lens membrane to change.
21 . The apparatus of claim 20 , wherein the said membrane is made of Polydimethylsiloxane (PDMS), wherein the fluid is an optical gel or polyphenyl ether and has a density no greater than 1.25 grams/cm3, and wherein a circular portion of the lens chamber measures at least 5 mm in diameter.