# US 2020/0396387 A1 · Methods and Systems for Measuring Image Quality

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- Number: US 2020/0396387 A1
- Document ID: US20200396387A1
- Status: Published application
- Kind: A1
- Application number: 16/987,345
- Filed: 2020-08-06
- Published: 2020-12-17
- Earliest claimed: 2017-03-23
- Assignees: Johnson & Johnson Surgical Vision, Inc.
- Applicants: Johnson & Johnson Surgical Vision, Inc.
- Inventors: Huawei Zhao
- Web page: https://patentgrep.com/patent/US20200396387A1

## CPC

- G01M 11/0257: {by analyzing the image formed by the object to be tested}
- A61F 2/1637: {Correcting aberrations caused by inhomogeneities; correcting intrinsic aberrations, e.g. of the cornea, of the surface of the natural lens, aspheric, cylindrical, toric lenses}
- G01M 11/0292: {of objectives by measuring the optical modulation transfer function (photometry G01J)}
- G02C 7/02: Lenses; Lens systems {; Methods of designing lenses}
- H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof
- H04N 23/695: Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
- H04N 25/71: Charge-coupled device [CCD] sensors; Charge-transfer registers specially adapted for CCD sensors
- A61F 2/16: Intraocular lenses
- G02C 2202/02: Mislocation tolerant lenses or lens systems
- G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## 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.

## Claims

### Claim at position 1

1-13. (canceled)

### Claim 14

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.

### Claim 15 (depends on 14)

The method of claim 14, wherein the changing of the relative z-axis position of of the IOL with respect to the CCD comprises changing the relative z-axis position of the IOL with respect to the CCD by a predetermine distance.

### Claim 16 (depends on 14)

The method of claim 14, wherein the predetermined distance can be 0.01 mm.

### Claim 17 (depends on 14)

The method of claim 14, wherein initial z-axis position can be −2 mm and the z-axis stop position can be +2 mm.

### Claim 18 (depends on 14)

The method of claim 14, wherein the changing of the relative angular position of the CCD with respect to the IOL comprises rotating the CCD relative to the IOL.

### Claim 19 (depends on 14)

The method of claim 14, wherein the CCD is positioned on a stage and wherein changing of the relative angular position of the CCD with respect to the IOL comprises rotating the stage relative to the IOL.

### Claim 20 (depends on 14)

The method of claim 14, wherein the changing of the relative angular position of the CCD with respect to the IOL comprises rotating an image capture window angularly.

### Claim 21 (depends on 14)

The method of claim 14, wherein the changing of the relative angular position of the CCD with respect to the IOL comprises changing the relative angular position of the CCD with respect to the IOL by a predetermine angle.

### Claim 22 (depends on 21)

The method of claim 21, wherein the predetermined angle can be 1 degree.

### Claim 23 (depends on 14)

The method of claim 14, wherein the predetermined angular stop position can be 90 degrees relative angle of the CCD with respect to the IOL.

### Claim 24 (depends on 14)

The method of claim 14, wherein the initial start angular position of the CCD can be 90 degrees relative angle of the CCD with respect to the IOL