Corneal Laser Treatment Planning for Focus Error Compensation
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Solution Overview
Problem
Existing surgical methods for correcting defective eyesight, such as LASIK, lack the ability to precisely isolate a volume of corneal tissue for optimal correction, particularly when considering optical focus errors and corneal deformation during laser surgery.
Innovation Solution
A planning device and method that uses measurement and defective-eyesight data to define a volume within the cornea, generating a control dataset for a laser device to create a boundary surface with a three-dimensional pattern of target points, allowing precise isolation and removal of the volume using pulsed laser radiation, compensating for optical focus errors and corneal deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional laser surgery methods are used, then surgical correction of defective eyesight can be performed, but the ability to precisely isolate a volume of corneal tissue is insufficient
Solution Approach 1:
The planning device performs preliminary calculations and generates a control dataset before surgery, defining the precise three-dimensional pattern of target points and boundary surface. This pre-planning enables the laser device to accurately isolate the intended volume without requiring complex real-time adjustments during surgery.
Solution Approach 2:
The patent replaces manual surgical planning and target point determination with an automated planning device that uses measurement data and defective-eyesight data to calculate optimal treatment parameters. This substitution of mechanical/manual processes with automated computational processes enhances precision while managing system complexity.
2Manufacturing precision
If manual intervention is used during surgery, then flexibility can be maintained, but correction quality and precision are reduced
Solution Approach 1:
The planning device operates autonomously by automatically processing measurement data and defective-eyesight data to generate the control dataset. The system serves itself by making all critical decisions regarding target points, boundary surfaces, and treatment parameters without requiring manual intervention, thereby ensuring consistent high precision.
Solution Approach 2:
The system uses measurement data obtained from the patient's eye to inform and adjust the treatment plan. The planning device processes this feedback information to calculate the optimal three-dimensional pattern of target points, ensuring the correction is precisely tailored to the individual patient's anatomical and optical characteristics.
3Manufacturing precision
If optical focus errors and corneal deformation are not compensated, then the surgical process is simpler, but correction accuracy deteriorates
Solution Approach 1:
The planning device performs preliminary calculations that anticipate and compensate for optical focus errors and corneal deformation before surgery begins. By pre-calculating correction factors and adjusting the target point pattern accordingly, the system counteracts these errors in advance, ensuring accurate correction without requiring complex real-time compensation mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and automated surgical correction of defective eyesight by isolating a volume in the cornea, improving correction quality and reducing the need for manual intervention, while accommodating optical focus errors and corneal deformation.
Implementation Method 1
a laser device, which separates corneal tissue by irradiation of pulsed laser radiation, said laser radiation being focused on target points arranged in a pattern in the cornea
Data Source
AI summary
A treatment method and apparatus for surgical correction of defective-eyesight in an eye of a patient, wherein a laser device is controlled by a control device, said laser device separating corneal tissue by irradiation of laser radiation to isolate a volume located within a cornea, wherein the control device controls the laser device to focus the laser radiation, by providing target points located within the cornea, into the cornea, wherein the control device, when providing the target points, allows for focus position errors which lead to a deviation between the predetermined position and the actual position of the target points when focusing the laser radiation, by pre-offsets depending on the positions of the respective target points to compensate for said focus position errors.