Accommodating intraocular lenses and methods of use

1. A method of changing an optical parameter of an accommodating intraocular lens; comprising:

implanting an intraocular lens comprising an optic portion and a peripheral portion extending peripherally from the optic portion, wherein the optic portion comprises an optical axis extending in an anterior to posterior direction and passing through the center of the optic portion, an anterior element, a posterior element, and a flexible intermediate layer disposed between the anterior element and the posterior element, the optical axis passing through the flexible intermediate layer,

wherein the flexible intermediate layer partially defines a channel in the optic portion that is in communication with the peripheral portion, wherein a flowable media is disposed in the channel in the optic portion and is capable of moving between the channel in the optic portion and the peripheral portion; and

moving the flowable media between the channel in the optic portion and the peripheral portion in response to ciliary muscle movement to change an optical parameter of the intraocular lens, wherein moving the flowable media between the optic portion and the peripheral portion comprises moving the intermediate layer and at least one of the anterior element and the posterior element from a first configuration to a second configuration.

2. The method of claim 1 wherein moving a flowable media between the optic portion and the peripheral portion comprises deforming the peripheral portion.

3. The method of claim 1 wherein moving the intermediate layer and at least one of the anterior element and the posterior element comprises moving the intermediate element and the anterior element.

4. The method of claim 1 wherein the anterior element, the flexible intermediate layer, the posterior element, and the flowable media in the optic portion all have substantially the same index of refraction.

5. The method of claim 1 wherein the flexible intermediate layer and the posterior element define the channel in the optic portion that is in communication with the peripheral portion.

6. The method of claim 1 wherein moving the intermediate layer and at least one of the anterior element and the posterior element comprises moving the intermediate layer and the posterior layer.

7. The method of claim 1 further comprising redistributing a second flowable media within a passive chamber within the optic portion.