Surgical Laser Controller for Presbyopia Treatment
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Solution Overview
Problem
Presbyopia, caused by the decreasing elasticity of the crystalline lens with age, leads to farsightedness as the lens loses its ability to change curvature for sharp near vision, and existing methods either reduce lens volume or are inefficient in restoring accommodation.
Innovation Solution
A surgical laser system with a controller that creates three-dimensional compression zones within the lens cortex or nucleus using calibrated laser pulses, altering the lines of traction to increase lens elasticity without changing volume, by producing lesions that act as sliding planes with specific dimensions and arrangements to enhance accommodation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If laser pulses are used to ablate or reduce lens volume to restore accommodation, then accommodation ability is improved, but lens volume is reduced which may cause harmful effects
Solution Approach 1:
The invention changes the physical state and optical parameters of the lens tissue through controlled laser-induced compression zones rather than removing tissue. By adjusting laser pulse parameters (energy, duration, frequency) to create compression zones with specific density and refractive index changes, the patent restores accommodation while preserving lens volume, avoiding the harmful effects of volume reduction
2Manufacturing precision
If multiple laser pulses are used to create compression zones with specific dimensions, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The controller is segmented into modular functional units: pulse generation module, timing control module, coordinate control module, and power adjustment module. Each module handles a specific aspect of the complex control task, making the overall system more manageable while achieving precise compression zone creation through coordinated operation of these independent but integrated components
Solution Approach 2:
The patent controls laser pulses in three-dimensional space (x, y, z coordinates) to create compression zones at precise locations within the lens. By adding spatial dimensionality control to the pulse parameters, the system achieves high manufacturing precision for compression zone placement and dimensions without requiring overly complex single-dimension control mechanisms
3Adaptability or versatility
If compression zones are created to increase lens elasticity, then accommodation amplitude is improved, but vision quality may be affected by improper lesion arrangement
Solution Approach 1:
The patent applies local quality changes by creating compression zones with specific properties (density, refractive index, elasticity) at precisely controlled locations within the lens tissue. The lesions are arranged in specific patterns with controlled spacing and dimensions, ensuring that elasticity enhancement occurs only in targeted regions while preserving optical quality in other areas of the lens
Solution Approach 2:
The invention replaces mechanical tissue removal or physical manipulation with optical field action. Laser pulses create compression zones through photomechanical effects (acoustic cavitation, shock wave formation) that increase lens elasticity without mechanical contact, thereby improving accommodation amplitude while avoiding mechanical damage that could compromise vision quality
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
This method precisely corrects vision deficiencies by increasing the crystalline lens's accommodation amplitude, providing a more uniform and effective solution than existing methods by maintaining lens volume and improving flexibility without adverse effects on vision quality.
Implementation Method 1
A surgical laser system with a controller that creates three-dimensional compression zones within the lens cortex or nucleus using calibrated laser pulses
Implementation Method 2
using a laser pulse or multiple laser pulses, wherein the controller is adapted such that a laser can be calibrated with respect to a reference point within the crystalline lens
Data Source
AI summary
The invention relates to a controller for a surgical laser. According to the invention, the controller is adapted to control a laser in order to produce two or more three-dimensional compression zones, each comprising a plurality of lesions, inside a lens cortex of a crystalline lens of the eye using a laser pulse or multiple laser pulses, wherein the controller is adapted such that a laser can be calibrated with respect to a reference point within the lens, and each of the compression zones produced has a length in a radial direction, a depth in a direction parallel to the optical or visual axis and an average width in a direction parallel to a tangent of the lens cortex, wherein the sum of the average widths of all compression zones is 0.1 to 2 millimeter for every 1 diopter of desired gain in accommodation amplitude of the lens.