Adjustable intraocular lenses and methods of post-operatively adjusting intraocular lenses
Disclosed are adjustable accommodating intraocular lenses and methods of adjusting accommodating intraocular lenses post-operatively. In one embodiment, an adjustable accommodating intraocular lens comprises an optic portion and a peripheral portion. At least one of the optic portion and the peripheral portion can be made in part of a composite material comprising an energy absorbing constituent and a plurality of expandable components. At least one of a base power and a cylindricity of the optic portion can be configured to change in response to an external energy directed at the composite material.
1. A method of adjusting an accommodating intraocular lens, comprising:
adjusting a base power of the accommodating intraocular lens by directing an external energy at a composite material within at least one of an optic portion and a peripheral portion of the accommodating intraocular lens,
wherein the composite material comprises an energy absorbing constituent and a plurality of expandable components,
wherein the optic portion comprises a fluid-filled optic fluid chamber and the peripheral portion comprises at least one haptic comprising a fluid-filled haptic fluid chamber in fluid communication with the optic fluid chamber, wherein the method further comprises directing the external energy at the composite material to displace fluid between the optic fluid chamber and the haptic fluid chamber,
wherein the optic portion is configured to deform, flex, or change shape in response to fluid entering or exiting the optic fluid chamber, and
wherein the plurality of expandable components are expandable microspheres, wherein each of the expandable microspheres comprises a blowing agent contained within a thermoplastic shell.
2. The method of claim 1 , further comprising adjusting the base power of the accommodating intraocular lens when the accommodating intraocular lens is implanted within an eye of a subject.
3. The method of claim 1 , further comprising adjusting the cylindricity of an optical surface of the optic portion of the accommodating intraocular lens by directing an external energy at the composite material arranged at diametrically opposed peripheral edges of the optic portion.
4. The method of claim 1 , wherein the external energy is a laser light having a wavelength between about 488 nm to about 650 nm.
5. The method of claim 1 , further comprising adjusting the base power of the optic portion between about +0.05 D to about +0.5 D by directing pulses of the external energy at the composite material.
6. The method of claim 1 , further comprising adjusting the base power of the accommodating intraocular lens by directing the external energy at the composite material to change a volume of the haptic fluid chamber.
7. The method of claim 1 , further comprising adjusting the base power of the accommodating intraocular lens by directing the external energy at the composite material to change a volume of the optic fluid chamber.
8. The method of claim 1 , wherein a volume of at least one of the expandable components is configured to expand between about 10× to 50× in response to the external energy directed at the composite material.
9. The method of claim 1 , wherein the expandable components comprise between about 5% to about 15% by weight of the composite material.
10. The method of claim 1 , wherein the expandable components comprise about 10% by weight of the composite material.
11. The method of claim 1 , wherein the energy absorbing constituent is an energy absorbing colorant.
12. The method of claim 11 , wherein the energy absorbing colorant is a dye.
13. The method of claim 11 , wherein the energy absorbing colorant is a pigment.
14. The method of claim 1 , wherein the energy absorbing constituent comprises between about 0.025% to about 1.00% by weight of the composite material.
15. The method of claim 1 , wherein at least one of the optic portion and the peripheral portion is made in part of a cross-linked copolymer comprising a copolymer blend, and wherein the composite material is made in part of the copolymer blend.
16. The method of claim 15 , wherein the composite material further comprises at least one of reactive acrylic monomer diluents, a photoinitiator, and a thermal initiator.