Systems and methods for evaluating and reducing negative dysphotopsia
US11708128B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2019 |
| Grant date | Jul 25, 2023 |
| Priority date | — |
| Expiry date | Jan 25, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2215/16
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems and methods for evaluating ND are described herein. An example method can include constructing a non-sequential (NSC) ray-tracing model of an eye with an ophthalmic lens, and modelling a light source and a detector. The detector can be configured to mimic a retina of the eye. The method can also include computing irradiance data using the light source, the NSC ray-tracing model, and the detector. Irradiance data can be computed for each of a plurality of pupil sizes. The method can further include evaluating ND by analyzing the respective irradiance data for each of the pupil sizes. Also described herein are methods for designing an ophthalmic lens edge that reduces the incidence of ND for a given ophthalmic lens by adjusting the edge thickness and/or the scatter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.