Patent ID: 8827446

Claim:
An electro-active lens, comprising: a first substrate; a second substrate; and an electro-active element disposed between the first substrate and the second substrate; wherein the electro-active element is configured to alter the optical power of at least a portion of the electro-active lens; wherein the first substrate comprises a different material than the second substrate; wherein the first substrate comprises a plastic material and wherein the second substrate comprises glass; wherein the first substrate has a front surface and a back surface; wherein the second substrate has a front surface and a back surface; wherein the front surface of the first substrate is disposed opposite to the back surface of the second substrate; wherein the back surface of the second substrate comprises a diffractive element or a pixilated element; and wherein the second substrate has an index of refraction that is approximately equal to the index of refraction of the electro-active element when the electro-active element is in an inactive state.