Lenticular Laser Incision for Low Myopia Extraction
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Solution Overview
Problem
Current laser eye surgery techniques, such as SMILE, face challenges in extracting a relatively small lenticule for patients with low myopia and/or hyperopia, making it difficult to correct refractive errors effectively.
Innovation Solution
The development of an ophthalmic surgical laser system using high repetition rate femtosecond lasers with an XY-scan device and Z-scan device to create precise top and bottom lenticular incisions, along with a transition ring incision, to form a thicker lenticule that is easier to extract while maintaining the necessary refractive correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional SMILE technique is used for low myopia and/or hyperopia patients, then the procedure can be performed with standard lenticular extraction, but the lenticule becomes relatively small and difficult to extract
Solution Approach 1:
The patent introduces a transition ring incision that adds a dimensional element to the lenticule structure. This transition ring creates an intermediate zone between the top and bottom lenticular incisions, effectively adding a structural dimension that facilitates extraction without increasing the overall lenticule volume excessively. The transition ring provides a structural framework that makes the small lenticule easier to grasp and remove.
Solution Approach 2:
The patent divides the lenticule into distinct segments by creating separate top and bottom lenticular incisions connected by a transition ring incision. This segmentation allows the lenticule to be structured in a way that provides access points and structural divisions, making it easier to manipulate and extract despite its small size. The transition ring acts as a segmented connector between the top and bottom surfaces.
2Ease of operation
If the lenticule thickness is increased to facilitate extraction, then extraction becomes easier, but the refractive correction may be compromised
Solution Approach 1:
The patent applies local quality by creating different structural zones within the lenticule. The transition ring provides a localized structural enhancement that facilitates extraction, while the top and bottom lenticular incisions maintain the precise refractive correction geometry. Each zone serves a specific function: the transition ring for extraction facilitation, and the lenticular incisions for optical correction.
Solution Approach 2:
The patent segments the lenticule structure into functional zones: the top lenticular incision for anterior surface correction, the bottom lenticular incision for posterior surface correction, and the transition ring for structural connectivity and extraction facilitation. This segmentation allows each zone to optimize its specific function without compromising the others.
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 approach allows for the creation of a thicker lenticule with the same refractive correction, making extraction easier and reducing the risk of tissue damage, thereby improving the efficacy of refractive surgery for low myopia and hyperopia corrections.
Implementation Method 1
ultra-short pulsed lasers emit radiation with pulse durations as short as 10 femtoseconds and as long as 3 nanoseconds... Different laser eye surgical systems use different types of laser beams for the various procedures and indications
Data Source
AI summary
Embodiments generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for lenticular laser incisions to form a top lenticular incision, a bottom lenticular incision of a lens in the subject's eye, an added shape between the top and bottom incisions where the added shape has no corrective power and a transition ring bisecting both the top and bottom lenticular incisions.