4 results about "Epikeratoplasty" patented technology

Equipment and methods for refractive surgery, including for keratoplasty. The invention describes equipment and methods for the production and implantation of a lamella of a tissue or material for the purpose of correcting a corneal geometry at maximum precision that is thus improved in relation to the prior art. The invention facilitates restoration of normal corneal geometry together with optical functionality of the cornea which is improved in relation to the prior art. A planning device, a treatment system and a planning method are designed to couple a device coordinate systems of the laser devices involved and characterization devices by application of registration and to uniquely register the supplied measurement data for generating the lamella to be implanted to the device coordinate systems by a specific, defined edge geometry of a blank from which the lamella is produced, and by the lamella, and by additional system and method aids.

The utility model relates to the technical field of corneal foreign matter cleaning, and provides a corneal foreign matter remover which comprises a needle tube and a needle head, the interior of the needle tube is hollow, the needle head is arranged at the end of the needle tube, a 120-degree bend is arranged at the position, 200-300 micrometers away from the needle tube, of the needle head, a round and smooth chamfer is arranged on the outer side of the bend of the needle head, and the round and smooth chamfer is connected with the needle head. And the end part of the needle head is a sharp inclined surface. The device can be used for scraping superficial foreign matters like a spoon, can be used for hooking deep corneal foreign matters like a hook, and can be used for cutting rust rings of magnetic foreign matters remained on a corneal stroma layer like a curved knife. The suture removing device is also an edge tool for suture removing after corneal transplantation and corneal laceration suture, and the degree of iatrogenic injury generated in the suture removing process can be reduced to the minimum degree.

Decellularized and shaped corneal tissue lenticules from allograft and / or xenograft sources and methods of obtaining such lenticules are disclosed. The lenticules are particularly useful as intrastromal lenticular implants in keratoplasty procedures, in which a hinged flap is formed in a patient's cornea and folded back along its hinge to expose the stromal bed of the cornea. The shaped lenticule is then applied to the stromal bed and the flap returned to its original position yielding a new curvature for the cornea and resulting in a desired refractive correction. Fine-tuning of the new refractive power can be achieved by laser ablation either at the same time as implantation or at later time in the event of regression or tonus changes. Methods of decellularizing cornea tissue are disclosed to reduce potential immunogenic reactions on the part of the patient to the implanted lenticule. The lenticules can be further treated to remove immunogenic epitopes. In addition, the posterior and / or anterior surfaces of the lenticule can be treated to assist in intrastromal seating of the lenticule and / or to reduce the likelihood of dislodgement. The methods of forming lenticules can further include preserving at least a portion of the Bowman's membrane. The smoothness of the Bowman's membrane surface also makes it less likely that reopening the flap will dislodge the lenticule.

A trephine blade (10, 56) for preparing a corneal graft for endothelial keratoplasty includes an asymmetric cutting formation (20) for cutting an asymmetrically shaped notch around a peripheral edge of the graft to indicate proper orientation of the graft in endothelial keratoplasty. In some embodiments, the cutting formation (20) projects along a longitudinal direction of the blade from a cutting end of the blade and generally includes a first edge (22) for making inwardly directed cuts on the graft and another cutting edge (24) for making outwardly directed cuts on the graft to form the asymmetric notch in the graft. The first edge (22) and an inner end of the other cutting edge (24) generally intersect at a curved channel (26) of the cutting formation (20). In the described embodiments, at least one of the opposite ends of the first edge (22) and the other cutting edge (24) of the cutting formation (20) is continuous with a respective curved cutting edge (32, 34) that curves into the cutting formation.