Corneal Laser Scan-Line Control for Precise Pocket Formation
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Solution Overview
Problem
Conventional ophthalmological devices lack precision and individuality in forming pockets within the cornea, particularly when dealing with existing pigment material, posing risks to the patient's eye.
Innovation Solution
An ophthalmological device comprising a laser source, focusing optics, and a scanner system controlled by an electronic circuit to create precise pockets in the cornea by varying scan line geometrical and physical parameters, allowing for triangular, trapezoidal, or connected pockets, and microstructures tailored to individual eye anatomy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional laser scanner with separate control of X and Y scanners is used, then the device structure is simple and easy to control, but the scanning speed is limited and cannot achieve high-speed scanning required for modern corneal treatments
Solution Approach 1:
The patent combines the X-scanner and Y-scanner into a single scanner unit with a unified control system. The single scanner performs both X-axis (fast scanning) and Y-axis (slow scanning) movements simultaneously, eliminating the need for separate scanner devices and their independent control systems, thereby achieving high scanning speed while maintaining relatively simple device structure
Solution Approach 2:
The patent implements dynamic scanning control where the scanning speed and trajectory are continuously adjusted during operation. The controller modifies scanning parameters in real-time based on the processing requirements, enabling the scanner to adapt its speed and path dynamically, which achieves high-speed scanning capability while maintaining control simplicity
2Productivity
If the scanning speed is increased to reduce treatment time, then productivity improves, but the precision of focal spot positioning and scan line formation deteriorates
Solution Approach 1:
The patent incorporates a feedback control mechanism where the controller continuously monitors the scanner's position and scanning speed, and adjusts control signals accordingly. This feedback system ensures that even at high scanning speeds, the focal spot remains precisely positioned along the intended scan lines, maintaining treatment precision while achieving high productivity
Solution Approach 2:
The patent pre-calculates and stores optimal scanning trajectories and speed profiles before treatment begins. The controller executes these pre-planned paths with precise timing, allowing the scanner to move at high speeds while maintaining accurate focal spot positioning. The preliminary preparation of scan paths enables high-speed operation without sacrificing precision
3Manufacturing precision
If the laser beam is focused to a small spot size for precise treatment, then manufacturing precision improves, but the scanning speed must be reduced to maintain adequate energy delivery
Solution Approach 1:
The patent uses pulsed laser operation where the laser emits energy in periodic pulses rather than continuous beam. This allows the focal spot to be maintained at a small size for precision treatment while the pulsed delivery mode enables faster scanning by delivering concentrated energy packets at high speed, resolving the contradiction between spot size and scanning speed
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 safe formation of pockets in the cornea for procedures such as keratopigmentation, reducing risks and enhancing treatment precision and adaptability to individual eye shapes.
Implementation Method 1
a laser source
Implementation Method 2
a focusing optics
Implementation Method 3
a scanner system comprising a first scanner device and a second scanner device
Data Source
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AI summary
The present disclosure relates to an ophthalmological device for surgical treatment of a cornea (202) of an eye (201), the ophthalmological device (100) comprising a laser source, a focusing optics, a scanner system and an electronic circuit. The electronic circuit is configured to control a first scanner device of the scanner system to move the focal spot (S) with a first scanning speed along a line, thereby forming a scan line (130), to control a second scanner device of the scanner system to move the scan line (130) with a second scanning speed along a predetermined processing path (160), which extends inside the cornea (202), for treating the cornea (202), and to control the ophthalmological device to vary at least one of: a geometrical parameter of the scan line (130) or a physical parameter of the scan line (130), along the predetermined processing path (160).