Additive manufacturing inside the human eye
Additive manufacturing techniques are used to form an artificial intra-ocular lens (IOL) directly inside the human eye. Small openings are formed in the cornea and lens capsule of the eye, and the crystalline lens is broken up and removed through the openings; then, a material is injected into the lens capsule through the openings, and the focal spot of a pulse laser beam is scanned in a defined pattern in the lens capsule, to transform the material in the vicinity of the lase focal spot to form the IOL in a layer-by-layer manner. In one embodiment, stereolithography techniques are used where a pulse UV laser source is used to photosolidify a photopolymer resin. The liquefied resin is injected into the eye through the openings, after which only part of the resin, having the shape of the desired IOL, is selectively cured with the UV laser beam, via progressive layer formation.
1. A method for forming an artificial intra-ocular lens (IOL) inside a patient's eye, comprising:
using a pulse laser beam from a laser system to form an opening in a cornea and an opening in a lens capsule of the patient's eye;
using the pulse laser beam from the laser system to break up a crystalline lens of the eye from the lens capsule;
removing the broken up crystalline lens through the openings in the cornea and the lens capsule;
injecting a material into the lens capsule through the openings in the cornea and the lens capsule; and
forming said artificial IOL directly inside the lens capsule by scanning a focal spot of the pulse laser beam from the laser system inside the lens capsule in a defined scanning pattern to transform the material in a vicinity of the focal spot of the pulse laser beam;
wherein the material includes unassembled individual slices of the IOL, wherein the injecting step includes incrementally injecting the individual slices into the lens capsule,
wherein the forming step includes scanning the focal spot of the pulse laser beam to incrementally assemble injected individual slices together, and
wherein the individual slices include slices of polymethylmethacrylate, and wherein the forming step includes scanning the focal spot of the pulse laser beam to melt surface layers of the polymethylmethacrylate slices.