Device and method for controlling a laser therapy of the eye
AssigneeCarl Zeiss Meditec AG
InventorsManfred Dick, Martin Hacker, Michael Kempe
Life of this patent
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Abstract
A device for controlling a laser therapy of the eye, including an evaluation unit that determines an intensity of a transient temperature effect by analysis of interferometric signals obtained from the eye and a control unit that controls the laser therapy, which is based on said transient temperature effect, the control unit being connected with said evaluation unit. A method for controlling a laser therapy of the eye, includes determination of the intensity of a transient temperature effect that is utilized for the control of the laser therapy, based on the effect, by analysis of interferometric signals.
Claims10
A device for controlling laser therapy of an eye, comprising:
- an evaluation unit that determines an intensity of a transient temperature effect in the eye by analysis of interferometric signals obtained from the eye;
- and
- a control unit that controls a laser that applies the laser therapy, which is based on said transient temperature effect, the control unit being operably connected with said evaluation unit.
A computer implemented method for controlling a laser applying laser therapy to an eye, comprising:
- determining an intensity of a transient temperature effect in a tissue of the eye by analysis of interferometric signals received from the eye;
- and
- using the intensity of the transient temperature effect to control the laser applying the laser therapy, the laser therapy being based on said transient temperature effect.
A computer implemented method of creating a three-dimensional, ophthalmological thermography, comprising:
- determining a Doppler broadening distribution Ω(x,y,z,t) by use of a Doppler OCT (DOCT);
- and
- determining a temperature distribution from the Doppler broadening distribution to create the thermography.
A computer implemented method of controlling a laser therapy of the eye, comprising:
- using a temperature distribution T to control a laser applying the laser therapy;
- and
- determining the temperature distribution T using the following relationship
- T
-
- (
- x
- ,
- y
- ,
- z
- ,
- t
- )
- =
- α
-
- Ω
-
- (
- x
- ,
- y
- ,
- z
- ,
- t
- )
- ·
- 3
-
- η
-
-
- a
-
-
- λ
- 0
- 2
-
- 16
-
- π
-
-
- k
- b
- wherein Ω is the Doppler frequency spread determined by DOCT;
- wherein kb is the Boltzmann constant;
- wherein η is a dynamic viscosity of a medium;
- wherein a is a particle diameter;
- wherein λ0 is an OCT spectral centroid;
- and wherein α is a material characteristic.
Dependencies are inferred from the claim text.