Patent ID: 8657877

Claim:
A prosthesis, comprising: an anterior lens; a posterior lens spaced from the anterior lens and aligned with the anterior lens along an optical axis, at least one of the anterior lens and the posterior lens having curvature providing positive or negative power; an optic body supporting the anterior lens and the posterior lens in spaced relation to one another to establish a chamber between the lenses; an optically transmissive primary fluid and an optically transmissive secondary fluid contained in the chamber of the optic body, the primary fluid having a first density and a first refractive index, the secondary fluid having a second density and a second refractive index that differ from the first density and the first refractive index, respectively, the primary and secondary fluids positioned in the chamber such that orienting the optical axis in a horizontal orientation for far vision positions the optical axis through the primary fluid but not the secondary fluid; and a non-lenticular internal plate positioned within the chamber between the anterior and posterior lenses, wherein the internal plate has planar, parallel opposite surfaces facing the anterior and posterior lenses, respectively, to contribute no power to the prosthesis, the opposite surfaces of the internal plate being spaced from the anterior and posterior lenses such that orienting the optical axis for near vision at a range of effective downward angles relative to the horizontal orientation positions the optical axis to extend through the primary fluid on one side of the internal plate and the secondary fluid on an opposite side of the internal plate.