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US 2020/0396387 A1Published application
Methods and Systems for Measuring Image Quality
AssigneeJohnson & Johnson Surgical Vision, Inc.
InventorHuawei Zhao
Life of this patent
Estimating the term…
Abstract
Methods and systems for measuring the asymmetrical image quality or image features of an intraocular lens (IOL), design, refractive and diffractive designs, such as IOLs with Extended tolerance of astigmatic effects are provided by through-focus and meridian response. Measurements are taken at various focal plane and meridian positions to allow for determination of areas of better performance away from 0 meridian or the start position and meridian.
Claims12
1-13. (canceled)
A method for evaluating performance of an intraocular lens, comprising:
- providing a charge coupled device (CCD) in an initial start position with respect to an intraocular lens (IOL) being measured, wherein the initial start position includes an initial angular position and an initial z-axis position;
- capturing a first image;
- repeatedly changing the relative angular position of the CCD with respect to the IOL and capturing images until the relative angular position of the CCD with respect to the IOL reaches a predetermined angular stop position;
- changing a relative z-axis position of the IOL with respect to the CCD and resetting the relative angular position of the CCD with respect to the IOL to the initial angular start position;
- repeatedly changing the relative angular position of the CCD with respect to the IOL and capturing images until the relative angular position of the CCD with respect to the IOL reaches the predetermined angular stop position;
- repeatedly changing the relative z-axis position of the IOL with respect to the CCD and capturing images until the relative z-axis position of the IOL with respect to the CCD reaches a predetermined z-axis stop position;
- and
- determining a measure of intraocular lens performance based upon the captured images.
5 more elements
Dependencies are inferred from the claim text.