Stick on devices using peripheral defocus to treat progressive refractive error
An apparatus to treat refractive error of an eye comprises an optic comprising an optical zone and a peripheral defocus optical structure to form images of a plurality of stimuli anterior or posterior to a peripheral portion of a retina of the eye. In some embodiments, the peripheral defocus optical structure is located outside the optical zone. In some embodiments, the peripheral defocus optical structure comprises optical power to focus light to a different depth of the eye than the optical zone. In some embodiments, the optic comprises one or more of a lens, an optically transparent substrate, a beam splitter, a prism, or an optically transmissive support.
1. An apparatus to treat refractive error of an eye, the apparatus comprising:
an optic comprising an optical zone;
a display coupled to the optic, the display having a periphery extending beyond the optical zone; and
a peripheral defocus optical structure coupled to the display to form images of a plurality of stimuli anterior or posterior to a peripheral portion of a retina of the eye;
an adhesive to couple the peripheral defocus optical structure to the display;
a plurality of substantially transparent electrodes; and
a liquid crystal material between the plurality of substantially transparent electrodes;
wherein the liquid crystal material and the peripheral defocus optical structure are positioned between the plurality of substantially transparent electrodes to activate and deactivate an optical power of the peripheral defocus optical structure.
2. The apparatus of claim 1 , wherein the peripheral defocus optical structure comprises the optical power to focus light to a different depth of the eye than the optical zone.
3. The apparatus of claim 1 , wherein the optic comprises one or more of a lens, an optically transparent substrate, a beam splitter, a prism, or an optically transmissive support.
4. The apparatus of claim 1 , wherein the peripheral defocus optical structure comprises a Fresnel lens.
5. The apparatus of claim 1 , wherein the peripheral defocus optical structure comprises one or more of a diffractive optical structure or echelettes.
6. The apparatus of claim 1 , further comprising a filter within the optical zone to decrease light transmission therethrough.
7. The apparatus of claim 6 , wherein the filter is configured to decrease an intensity of a central image formed on a fovea of the eye and provide an increased intensity of the plurality of stimuli in relation to the intensity of the central image.
8. The apparatus of claim 6 , wherein the filter extends into the peripheral defocus optical structure.
9. The apparatus of claim 6 , wherein the filter comprises a neutral density filter.
10. The apparatus of claim 6 , wherein the filter reduces transmission of visible light by a factor of between 5 and 30.
11. The apparatus of claim 6 , wherein the filter reduces transmission of visible light by an amount within a range from 5 percent to 99 percent.
12. The apparatus of claim 1 , wherein the display is configured to provide light through the optical zone to form a central image on a macula and through the peripheral defocus optical structure to provide the plurality of stimuli with defocus on the peripheral portion of the retina.
13. The apparatus of claim 1 , further comprising a base, wherein the peripheral defocus optical structure is coupled to the base.
14. The apparatus of claim 13 , further comprising the adhesive on a surface of the base.
15. The apparatus of claim 14 , wherein the optic comprises a spectacle lens, and a filter and the peripheral defocus optical structure are coupled to the spectacle lens.
16. The apparatus of claim 1 , further comprising:
a processor operatively coupled to the display, wherein the processor comprises instructions to provide the plurality of stimuli on the display at a plurality of locations to form the images at the plurality of locations anterior or posterior to the retina.
17. The apparatus of claim 16 , wherein the peripheral defocus optical structure comprises a plurality of peripheral defocus optical structures, and wherein the each of the plurality of stimuli on the display is aligned with a corresponding defocus optical structure to form an image at a location anterior or posterior to the peripheral portion of the retina.
18. The apparatus of claim 17 , wherein the processor is operatively coupled to the plurality of substantially transparent electrodes to activate the peripheral defocus optical structure to provide the plurality of stimuli.
19. The apparatus of claim 18 , further comprising: a base, wherein the peripheral defocus optical structure is coupled to the base and wherein the adhesive is located on a surface of the base to couple the peripheral defocus optical structure to the display.