Non-contact magnetoresonant implant system and techniques for pe

Details Non-contact magnetoresonant implant system and techniques for pe Non-contact magnetoresonant implant system and techniques for pe

1998-08-03

1999-12-28

O'Connor, Cary

Surgery

Miscellaneous

Devices placed entirely within body and means used therewith

600 9, 600 12, 606 5, 606 27, 607 53, A61F 1300, A61B 1736, A61N 108, A61M 3700

Patent

active

06006756&

ABSTRACT:
A system and technique called magnetoresonant induction of an intrastromal implant that is adapted for corneal re-shaping. The technique is utilized to correct mild to high hyperopia and presbyopia by steepening the anterior corneal curvature in a single treatment, or in periodic treatments over the lifetime of the patient. The system comprises a combination of components including (i) at least one implantable magnetoresonant intrastromal segment, and (ii) an oscillating magnetic field generator together with a dosimetry control system including at least one emitter body adapted for positioning proximate to the patient's eye and intrastromal implant. The system can deliver thermal effects to appropriate stromal lamellae by non-contact inductive heating of the implant which in turn contracts or compresses stromal collagen fibrils into a circumferential cinch about an anterior layer of the cornea and steepens the anterior corneal curvature. A dosimetry control system controls the power level and duration of exposure of the oscillating magnetic field(s) and may be combined with intraoperative corneal topography.

REFERENCES:
patent: 4381007 (1983-04-01), Doss
patent: 5533999 (1996-07-01), Hood et al.
patent: 5766171 (1998-06-01), Silvestrini

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