使用激光视力矫正来矫正较高阶像差的方法
By using femtosecond laser to cut small lenses, combined with a scanner system and wavefront height described by polynomials, the problem of correcting higher-order aberrations has been solved, achieving precise vision correction.
CN115551448BActive Publication Date: 2026-07-17ALCON INC
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ALCON INC
- Filing Date
- 2021-05-26
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing technologies are insufficient to effectively correct higher-order aberrations, especially complex refractive errors caused by corneal and lens curvature abnormalities and distortions.
Method used
The femtosecond laser is used to cut small lenses. The laser radiation focus is controlled in the cornea by a scanner system, and the lens thickness is adjusted according to the wavefront height and corneal curvature. The wavefront height is described by Zernike polynomials or Fourier polynomials, and precise cutting is achieved by combining it with a 3D scanner.
Benefits of technology
It enables efficient correction of higher-order aberrations without the formation of a membrane flap, thus improving the accuracy and effectiveness of vision correction.
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Figure CN115551448B_ABST
Abstract
本公开内容提供一种用于矫正较高阶像差的方法，该方法包括提供激光辐射。该方法还包括通过扫描仪系统控制激光辐射的光束焦点的位置并且引导该光束焦点，其方式为使得该光束焦点的位置在眼睛的角膜中。该方法进一步包括将激光辐射引入眼睛的角膜中。该方法包括切割小晶状体，其中，小晶状体的厚度t(X / Y)满足以下等式：t(X / Y)＝t0+Δt(X,Y) / (n‑1)，式中，Δt(X,Y)表示较高阶波前高度，并且t0表示球面屈光力为D的小晶状体的厚度。
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