Accommodative intraocular lens

An apparatus comprising an accommodating intraocular lens implant, which is shaped so as to be assemblable into an assembled state in situ in a capsular bag of a human eye so as to have a central optical axis, and which comprises:

• an anterior floating lens unit, which comprises an anterior lens;
• a posterior lens unit, which comprises a posterior lens;
• an anterior rim;
• levers, which are, when the lens implant is in the assembled state, (a) (i) in pivotable contact with the anterior floating lens unit at respective first longitudinal sites along the levers, (ii) in pivotable contact with the anterior rim at respective second longitudinal sites along the levers, and (iii) in pivotable contact with the posterior lens unit at respective third longitudinal sites along the levers, and (b) arranged to move the anterior floating lens unit toward and away from the anterior rim, in an anterior-posterior direction, wherein, for each respective lever of the levers, the second longitudinal site is farther from the central optical axis than the first longitudinal site is from the central optical axis, and the third longitudinal site is farther from the central optical axis than the second longitudinal site is from the central optical axis;
• and
• a circumferential rim, which is attached to the levers such that at least a portion of the circumferential rim is farther from the central optical axis than the second longitudinal sites are from the central optical axis,
• wherein the lens implant is arranged such that in the assembled state:
• elastic potential energy is stored in the lens implant as a result of deformation of the lens implant during a transition from a fully-accommodated state to a fully-unaccommodated state, and
• at least 50% of the elastic potential energy stored in the lens implant as the result of the deformation is stored in the circumferential rim, and
• wherein the circumferential rim is arranged in pivotable contact with the posterior lens unit when the lens implant is in the assembled state.

An apparatus comprising an accommodating intraocular lens implant, which is shaped so as to be assemblable into an assembled state in situ in a capsular bag of a human eye so as to have a central optical axis, and which comprises:

• an anterior floating lens unit, which comprises an anterior lens;
• a posterior lens unit, which comprises a posterior lens;
• an anterior rim;
• levers, which are, when the lens implant is in the assembled state, (a) (i) in pivotable contact with the anterior floating lens unit at respective first longitudinal sites along the levers, (ii) in pivotable contact with the anterior rim at respective second longitudinal sites along the levers, and (iii) in pivotable contact with the posterior lens unit at respective third longitudinal sites along the levers, and (b) arranged to move the anterior floating lens unit toward and away from the anterior rim, in an anterior-posterior direction, wherein, for each respective lever of the levers, the second longitudinal site is farther from the central optical axis than the first longitudinal site is from the central optical axis, and the third longitudinal site is farther from the central optical axis than the second longitudinal site is from the central optical axis;
• and
• a circumferential rim, which is attached to the levers such that at least a portion of the circumferential rim is farther from the central optical axis than the second longitudinal sites are from the central optical axis,
• wherein the lens implant is arranged such that in the assembled state:
• elastic potential energy is stored in the lens implant as a result of deformation of the lens implant during an elastic-potential-energy-storage transition from a fully-accommodated state to a fully-unaccommodated state,
• at least 50% of the elastic potential energy stored in the lens implant as the result of the deformation is stored in the circumferential rim,
• during the elastic-potential-energy-storage transition from the fully-accommodated state to the fully-unaccommodated state, the circumferential rim rotates about a circumferential axis thereof in a first rotational direction, thereby storing elastic potential energy, and
• during an elastic-potential-energy-release transition from the fully-unaccommodated state to the fully-accommodated state, the circumferential rim rotates about the circumferential axis in a second rotational direction opposite the first rotational direction, thereby releasing the stored elastic potential energy.

An apparatus comprising an accommodating intraocular lens implant, which is shaped so as to be assemblable into an assembled state in situ in a capsular bag of a human eye so as to have a central optical axis, and which comprises:

• an anterior floating lens unit, which comprises an anterior lens;
• a posterior lens unit, which comprises a posterior lens;
• an anterior rim;
• and
• levers, which are, when the lens implant is in the assembled state, (a) (i) in pivotable contact with the anterior floating lens unit at respective first longitudinal sites along the levers, (ii) in non-jointed pivotable contact with the anterior rim at respective second longitudinal sites along the levers, and (iii) in pivotable contact with the posterior lens unit at respective third longitudinal sites along the levers, and (b) arranged to move the anterior floating lens unit toward and away from the anterior rim, in an anterior-posterior direction, wherein, for each respective lever of the levers, the second longitudinal site is farther from the central optical axis than the first longitudinal site is from the central optical axis, and the third longitudinal site is farther from the central optical axis than the second longitudinal site is from the central optical axis.