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US 2025/0176824 A1Published application
Wide-Field Dynamic Aberrometer Measurements for Myopia Control with Customized Contact Lenses
AssigneeWaveFront Dynamics, Inc.
InventorsJames Copland, Daniel R. Neal, Lyle Kordonowy
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Abstract
This invention relates to optical methods and optical systems for making both on-axis and wide-field, peripheral off-axis wavefront measurements of an eye; and for designing and manufacturing wavefront-guided customized contact lens useful for myopia control. The wide-field optical instrument can comprise either (1) a multi-axis optical configuration using multiple off-axis beamlets, or (2) an instrument comprising a rotatable scanning mirror that generates off-axis probe beams.
Claims21
A wide-field scanning optical instrument, comprising:
- a main optical axis of the optical instrument;
- a front end of the optical instrument;
- a back end of the optical instrument;
- an eye imaging camera positioned at the back end of the optical instrument;
- a wavefront sensor;
- a video fixation target;
- a first front lens located on the main optical axis, positioned closest to the front end of the optical instrument;
- a first beamsplitter located on the main optical axis, positioned behind the first front lens, and configured to direct light towards a wavefront sensor;
- a second beamsplitter located on the main optical axis, positioned behind the first beamsplitter, and configured to direct light from a video fixation target to a patient's eye when the patient's eye is positioned at the front end of the optical instrument;
- a second rear lens, positioned behind the second beamsplitter;
- an eye imaging camera positioned behind the second rear lens;
- a range limiting aperture (RLA);
- a third lens;
- a third beamsplitter;
- a scanning mirror;
- and
- a probe beam source;
- wherein the RLA is located in-between the first beamsplitter and the third lens;
- wherein the third lens is located in-between the RLA and the third beamsplitter;
- wherein the third beamsplitter is located in-between the third lens and the wavefront sensor;
- wherein the probe beam source generates an adjustable probe beam with an adjustable, off-axis angle of incidence that is directed towards the scanning mirror, which redirects the adjustable probe beam in either an on-axis or an off-axis direction towards the third beamsplitter, which then redirects the adjustable probe beam through the third lens and the RLA, and onto the first beamsplitter, which then redirects the adjustable probe beam through the first front lens onto the patient's eye at an adjustable, off-axis angle of incidence, θ, which is measured relative to the main optical path;
- wherein θ>0 degrees.
19 more elements
A method of using a wide-field scanning optical instrument to measure on-axis and off-axis refractions and on-axis and off-axis higher-order aberrations of an eye of a patient fitted with a contact lens, the method comprising:
- (a) providing a wide-field scanning optical instrument with a probe beam configured to point towards the eye at an adjustable, off-axis angle of incidence, θ, comprising:
- (1) an on-axis probe beam that is coincident with an on-axis main optical path;
- and
- (2) an off-axis probe beam pointing towards the eye at an adjustable, off-axis angle of incidence, θ;
- where θ>0°;
- (b) looking into the wide-field scanning optical instrument with the eye and focusing a gaze on a moveable video fixation target;
- (c) continuously operating a corneal topographer mode of the wide-field scanning optical instrument to determine a shape of the cornea;
- and
- (d) making a plurality of rapidly interleaving measurements between two alternating, interleaved measurements, for a given off-axis probe beam, wherein making the two alternating, interleaved measurements comprise:
- (1) measuring one or more geometric properties of the eye's pupil and contact lens with an iris imaging camera disposed on the main optical path, and
- (2) measuring a wavefront of light scattered from a retina of the eye generated by an on-axis or off-axis probe beam, for each on-axis probe beam and each off-axis probe beam.
8 more elements
A method of controlling a progression of myopia in an eye of a patient, using a wide-field scanning optical instrument, the method comprising:
- (a) positioning a video fixation target in the wide-field scanning optical instrument at an appropriate position along a main optical path to stimulate a desired accommodation level;
- (b) measuring a refraction and one or more higher-orders aberrations of a bare eye, both on-axis and off-axis, with the instrument;
- (c) measuring the eye with the wide-field scanning optical instrument, with a patient's existing contact lens (if any);
- (d) analyzing the measured data to calculate an off-axis refraction profile comprising Sphere, Cylinder, and Axis, and further comprising higher-order aberrations;
- (e) selecting a trial contact lens based on the measured off-axis refraction profile;
- (f) putting a trial contact lens on the eye;
- (g) measuring the eye with the trial contact lens in place;
- (h) analyzing measured data to determine centration offset(s) of the trial contact lens, if any;
- (i) determining if a desired off-axis refraction profile was achieved;
- (j) adjusting trial contact lens selection, and repeating steps (a) through (i), as necessary;
- and
- (k) if necessary, due to contact lens centration offsets, designing a wavefront-guided (WFG) customized contact lens that will deliver the desired off-axis refraction profile.
9 more elements
Dependencies are inferred from the claim text.