Enhanced Multifocal Intraocular Lens for Improved Optical Performance
Legal Citation
Summary of the Inventive Concept
The present invention relates to an enhanced multifocal intraocular lens (IOL) that addresses the limitations of existing IOLs by providing improved optical performance, reduced aberrations, and enhanced image quality.
Background and Problem Solved
Existing multifocal IOLs often exhibit limitations such as aberrations, reduced visual acuity, and dependence on glasses after implantation. The original patent disclosed a method for determining cross sections of a first diffractive profile for an IOL, but it did not address the issues of aberrations and optical performance. The present invention solves these problems by introducing novel design elements and optimization methods.
Detailed Description of the Inventive Concept
The enhanced multifocal IOL features a diffractive profile with variable thickness and constant curvature, ensuring improved optical performance and reduced aberrations. The invention also includes a method for optimizing the sphericity between diffractive steps, resulting in enhanced image quality. Additionally, the IOL can comprise a spherical surface and an aspherical surface, with the aspherical surface designed to reduce spherical aberrations. A system for designing the multifocal IOL is also disclosed, comprising a computer-aided design module and an optimization module.
Novelty and Inventive Step
The novelty of the present invention lies in the introduction of variable thickness and constant curvature in the diffractive profile, the optimization method for sphericity between diffractive steps, and the use of aspherical surfaces to reduce aberrations. These features are not disclosed in the original patent and provide a significant improvement over existing multifocal IOLs.
Alternative Embodiments and Variations
Alternative embodiments of the inventive concept may include varying the number of active diffractive orders along the optical axis, using different materials or manufacturing techniques, or incorporating additional features such as wavefront sensing or adaptive optics.
Potential Commercial Applications and Market
The enhanced multifocal IOL has significant commercial potential in the ophthalmic industry, particularly in the treatment of cataracts and myopia. The invention can be marketed as a premium product offering improved visual outcomes and reduced dependence on glasses, appealing to patients and surgeons seeking advanced IOL technology.
CPC Classifications
| Section | Class | Group |
|---|---|---|
| A | A61 | A61F2/1618 |
| A | A61 | A61F2/1656 |
| G | G02 | G02B5/1876 |
Section 103 Obviousness Analysis (PHOSITA)
Field of Art
Ophthalmic medical devices, specifically intraocular lens (IOL) design and optical engineering, requiring advanced knowledge of optical systems, diffractive optics, and surgical implant technologies
Person of Ordinary Skill (PHOSITA) Profile
A biomedical engineer or optical design specialist with expertise in ophthalmic lens design, advanced knowledge of diffractive optics, understanding of surgical implant constraints, and proficiency in computer-aided design and optical modeling techniques
Obviousness Rationale
A PHOSITA would recognize that the PTD's variations represent predictable engineering improvements to the source patent's multifocal IOL design. The disclosed modifications of variable thickness, constant curvature, and aspherical surface configurations are logical extensions of existing optical design principles. These variations address known limitations in IOL performance through standard optical engineering optimization techniques.
Obvious Combinations & Variations
Original Patent Information
| Patent Number | US 11,857,392 |
|---|---|
| Title | Multifocal intraocular lens |
| Assignee(s) | HANITA LENSES LTD. |