Fluidic module for accommodating soft contact lens
A meniscus shaped lens module comprises one or more structures that decrease an amount of pressure or force to move one or more surfaces of the lens module and increase a separation distance of anterior and posterior surfaces of the module in order to provide an increase in optical power. A lens structure of the module comprises one or more of a pattern of a surface of a central chamber, a meniscus, a reduced diameter or a soft material in order to provide increased amounts of curvature of an outer contact lens surface with decreased amounts of pressure. The pattern can be formed in one or more of many ways, and may comprise one or more of folds, patterning, bellows or concertinaed surface of an optically transmissive material having a substantially uniform thickness such as a sheet of a membrane material.
1. An accommodating contact lens comprising:
a central optical reservoir comprising an anterior membrane and a posterior membrane, wherein the anterior membrane comprises a variable thickness profile to decrease aberrations; and
an outer reservoir fluidically coupled to the central optical reservoir with a channel;
wherein the central optical reservoir comprises an aspheric near vision shape profile, the near vision aspheric shape profile comprising a change in volume when transitioning from a far vision shape profile to the near vision profile and wherein the change in volume comprises less than a volume of a spherical profile of similar diameter transitioning from a far vision shape profile to a near vision profile.
2. The accommodating contact lens of claim 1 , further comprising a soft contact lens material disposed over the anterior membrane and wherein an index of refraction of the soft contact lens material approximates an index of refraction of the anterior membrane in order to inhibit optical effects of the variable thickness profile of the anterior membrane.
3. The accommodating contact lens of claim 2 , wherein the plurality of protrusions is arranged to provide an aspheric surface to provide near vision to the user.
4. The accommodating contact lens of claim 3 , wherein the plurality of protrusions comprises a first plurality of inner protrusions having first spacings between said inner protrusions and a second plurality of outer protrusions having second spacings between said second protrusions, said first spacings different from said second spacings to inhibit aberrations.
5. The accommodating contact lens of claim 4 wherein said second spacings comprise amounts greater than said first spacings.
6. The accommodating contact lens of claim 2 , wherein the plurality of protrusions comprises variable spacing among each of the plurality of protrusions to inhibit the aberrations.
7. The accommodating contact lens of claim 3 , wherein the plurality of protrusions comprises one or more of steps or ribs.
8. The accommodating contact lens of claim 3 , wherein the plurality of protrusions comprises concentric protrusions arranged about a central axis of the central optical reservoir.
9. The accommodating contact lens of claim 3 , wherein the plurality of protrusions comprises varied heights.
10. The accommodating contact lens of claim 1 , wherein the variable thickness profile comprises a plurality of protrusions arranged to inhibit aberrations.
11. The accommodating contact lens of claim 1 , wherein the variable thickness profile comprises a continuous profile of varying thickness or an incrementally stepped profile of varying thickness to inhibit aberrations.
12. The accommodating contact lens of claim 1 , wherein one or more of the posterior membrane or the anterior membrane comprises a curved spherical in order to provide far vision correction to the user in combination with an anterior surface of the contact lens defining an optical zone.
13. The accommodating contact lens of claim 1 , wherein the posterior membrane and the anterior membrane each comprises a curved spherical surface defining a meniscus profile of the central optical reservoir in order to provide far vision correction to the user in combination with an anterior surface of the contact lens defining an optical zone.
14. The accommodating contact lens of claim 1 , wherein the anterior membrane comprises an aspheric profile when providing a near vision correction to the user.
15. The accommodating contact lens of claim 1 , wherein a soft contact lens material comprises a thickness extending between an anterior optical surface of the contact lens and an anterior surface of the anterior membrane and wherein the thickness varies across the anterior membrane in order to correct vision of the user.
16. The accommodating contact lens of claim 1 , wherein a soft contact lens material comprises a thickness extending between an anterior optical surface of the contact lens and an anterior surface of the anterior membrane and wherein the thickness varies across the anterior membrane in order to inhibit optical artifacts related to variations in thickness of the anterior membrane.
17. The accommodating contact lens of claim 1 , wherein the outer reservoir comprises an upper boundary positioned so as to correspond to an upper position of a lower lid of the eye for an upper normal bound of a 95% confidence interval of a patient population and a lower boundary positioned to overlap substantially with the lower lid of the eye for a lower normal bound of the 95% confidence interval of the patient population.