Adjustable toric intraocular lens

摘要

An adjustable astigmatism-reducing intraocular lens includes a toric optic with a long axis. The optic is rotationally coupled to haptics, and a plurality of struts extend between the optic and the haptics. The struts are held under tension and individually releasable via laser, or are heat shrinkable to increase the tension of selective struts. When a strut is released or shrunk, a torsional force is applied to angularly adjust the optic relative to the haptics. After the lens has been implanted and healed relative to the tissue, struts are individually released via laser ablation to cause torsional instability and resulting net rotational adjustment, or individually heat shrunk to tension the strut, to cause torsional instability, and effect net rotational adjustment to ensure that a long axis of optic is aligned with the axis of astigmatic correction of the eye.

主权项

1. An intraocular lens, comprising:
a) a tonic optic having an optical axis, a shorter axis and a longer axis; b) first and second haptics physically separate and distinct from said optic, said optic rotationally coupled to said first and second haptics; and c) a plurality of struts connected and extending non-radially between said optic and at least one of said first and second haptics to rotationally retain said optic in a state of equilibrium,
wherein at least one of said struts can be modified to temporarily disrupt said state of equilibrium by causing a net torsional force between said optic and said first and second haptics to effect rotation of said optic about said optical axis relative to said first and second haptics.