Method and apparatus for measuring biomechanical...

Details Method and apparatus for measuring biomechanical... Method and apparatus for measuring biomechanical...

2006-02-28

2006-02-28

Marmor, Charles (Department: 3736)

Surgery

Diagnostic testing

Testing aqueous humor pressure or related condition

C600S405000, C600S587000

Reexamination Certificate

active

07004902

ABSTRACT:
A method for measuring a biomechanical characteristic of corneal tissue of a cornea comprises the steps of measuring a geometric parameter of the cornea, measuring hysteresis associated with deformation of the cornea, and evaluating the measured geometric parameter and hysteresis. In an ophthalmic system for practicing the method, a pachometer is used to measure corneal thickness and a tonometer is used to measure hysteresis, and the measurement data is supplied to a computer for evaluation. A related method for prequalifying LASIK patients comprises the steps of establishing a multi-dimensional space wherein a first dimension is a geometric corneal parameter and a second dimension is hysteresis associated with corneal deformation, measuring the geometric corneal parameter and hysteresis of the patient's cornea, registering the geometric corneal parameter and corneal hysteresis in a data point in the multi-dimensional space, and evaluating a location of the data point in the multi-dimensional space.

REFERENCES:
patent: 5474066 (1995-12-01), Grolman
patent: 6113542 (2000-09-01), Hyman et al.
patent: 6419631 (2002-07-01), Luce
patent: 6817981 (2004-11-01), Luce
patent: 001147738 (2001-10-01), None

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