Multilens intraocular system implantation with injectable accommodation material
The invention relates to a multi-lens intraocular lens system having an accommodation material between the lenses. The system comprises an posterior lens attached to the posterior surface of the capsular bag and an anterior lens attached to the anterior surface of the capsular bag. The anterior and posterior lenses have different optical properties providing different degrees and types of correction. An accommodation material is placed between the anterior and posterior lenses. The accommodation material may comprise of one or more macromers, which, when polymerized, adjust the properties of the accommodation material.
1. A method for forming an accommodating intraocular lens system comprising:
implanting a posterior lens in the posterior portion of a patient's capsular bag;
implanting an anterior lens in the anterior portion of said capsular bag; and
forming an accommodation material within the capsular bag such that the accommodation material is interposed between said anterior and posterior lenses; wherein
said anterior lens has a positive diopter power,
said posterior lens has a negative diopter power,
the accommodation material is capable of changing shape, and this change in shape facilitates the movement of the posterior lens and the anterior lens in response to the capsular bag extending or contracting with a change of focus of the intraocular lens system,
said accommodation material comprises macromers dispersed therein, said macromers ca able of stimulus induced polymerization to adjust physical properties of the accommodation material making it more or less flexible for responding to extension or contraction in the capsular bag with the change of focus, and
at least one of said anterior lens and said posterior lens has from 2 to 4 haptic arms.
2. The method of claim 1 wherein the accommodation material is formed by injecting accommodation material precursors into the capsular bag and polymerizing the precursors to form an accommodation material.
3. The method of claim 2 , wherein the polymerization of the precursors is a catalyst induced polymerization.
4. The method of claim 1 wherein the accommodation material is formed in the presence of macromers.
5. The method of claim 4 wherein the macromers are capable of stimulus induced polymerization.
6. The method of claim 5 wherein the macromers are capable of photopolymerization.
7. The method of claim 1 further comprising the steps of forming a capsulorhexis in the posterior portion of the capsular bag and sealing the capsulorhexis with said posterior lens.
8. A method for forming an accommodating intraocular lens system comprising:
inserting a posterior lens into the posterior portion of a patient's capsular bag;
inserting an anterior lens into the anterior portion of said capsular bag;
preparing a first precursor mixture;
preparing a second precursor mixture;
introducing said first and second precursor mixtures into said capsular bag;
reacting said first and second precursor mixtures to form an accommodation material within said capsular bag, wherein
said anterior lens has a positive diopter power,
said posterior lens has a negative diopter power,
the accommodation material is capable of changing shape, and this change in shape facilitates the movement of the posterior lens and the anterior lens in response to the capsular bag extending or contracting with a change of focus of the intraocular lens system,
said accommodation material comprises macromers dispersed therein, said macromers capable of stimulus induced polymerization to adjust physical properties of the accommodation material making it more or less flexible for responding to extension or contraction in the capsular bag with the change of focus, and
at least one of said anterior lens and said posterior lens has from 2 to 4 haptic arms.
9. The method of claim 8 wherein said first precursor mixture comprises:
a first accommodation material precursor,
a macromer, and
a photoinitiator.
10. The method of claim 8 wherein the second precursor mixture comprises:
a second accommodation material precursor, and
a catalyst.
11. The method of claim 9 wherein said macromer is capable of stimulus induced polymerization.
12. The method of claim 8 wherein said accommodation material is formed in the presence of macromers capable of stimulus induced polymerization.
13. The method of claim 12 wherein said macromers comprise a siloxane moiety.
14. The method of claim 8 further comprising the steps of forming a capsulorhexis in the posterior portion of the capsular bag and sealing the capsulorhexis with said posterior lens.
15. The method of claim 1 , wherein:
the stimulus is an irradiation with an ultraviolet light.