Intraocular lens systems and related methods

An intraocular lens system, comprising:

• a diffractive lens configured to be implanted in an eye of a subject, the diffractive lens including,
• a first material having a first outer surface;
• a second material having a second outer surface remote from and generally facing away from the first outer surface, wherein at least the first material includes an electrically-modifiable index of refraction;
• and
• an electrically-modifiable diffraction pattern defined between the first material and the second material;
• a first electrode in on the first outer surface of the first material;
• a second electrode on the second outer surface of the second material;
• and
• a controller including a processor, operably coupled to the first and second electrodes, the controller configured to selectively bias one or more of the first and second electrodes effective to modify at least the electrically-modifiable index of refraction, the electrically-modifiable diffraction pattern, and an effective focal length of the intraocular lens system from a first effective focal length to a second effective focal length over a selected duration of time that is greater than a duration required for an average human eye to accommodate between the first effective focal length and the second effective focal length.