Systems, apparatus, and methods for regulating refractive error development through the modulation of peripheral distortion
In general, one aspect disclosed features a flexible lens element for application to a spectacle lens, the flexible lens element comprising: a central zone having an optical center corresponding to the visual axis of an eye of a patient; and a peripheral zone peripheral to the central zone and comprising: a first zone having a first thickness, and a second zone having a second thickness, wherein: the second thickness varies from the first thickness, and a distance from the second zone to the optical center of the central zone is selected to generate pincushion distortion or barrel distortion in the eye of the patient.
1. A flexible lens element for application to a spectacle lens, the flexible lens element comprising:
a central zone having an optical center corresponding to the visual axis of an eye of a patient; and
a peripheral zone peripheral to the central zone and comprising:
a first zone having a first index of refraction, and
a second zone having a second index of refraction, wherein:
the second index of refraction varies from the first index of refraction, and
a distance from the second zone to the optical center of the central zone is selected to generate pincushion distortion or barrel distortion in the eye of the patient.
2. A method for defining a flexible lens element to be manufactured for an eye of a patient, the flexible lens element for application to a spectacle lens, the flexible lens element comprising:
selecting a central zone having a center corresponding to a visual axis of the eye of the patient;
selecting a peripheral zone peripheral to the central zone; and
selecting, for the peripheral zone:
a first zone having a first index of refraction, and
a second zone having a second index of refraction, wherein:
the second index of refraction varies from the first index of refraction, and
a distance from the second zone to the optical center of the central zone is selected to generate pincushion distortion or barrel distortion in the eye of the patient.
3. The method of claim 2 , further comprising:
selecting, for the central zone, a conic-section curve to generate spherical aberration in the eye of the patient.
4. The method of claim 3 , wherein:
the spherical aberration generated in the eye of the patient is one of a positive, negative or neutral spherical aberration.