Rigid, gas-permeable polymer as over-mold and sealant for adaptive opthalmic lens
An eye-mountable device is provided that includes electronics encapsulated within a rigid, gas-permeable polymeric material. The eye-mountable device includes an electroactive lens that can be operated to control an overall optical power of the eye-mountable device to restore an amount of visual accommodation of an eye to which the device is mounted. A method for fabricating the eye-mountable device is provided that includes applying an adhesive to secure lenses of the electroactive lens together and to maintain an amount of liquid crystal in the space between the lenses. The rigid, gas-permeable polymeric material can then be formed around the electroactive lens, electronics, or other elements of the eye-mountable device. The rigid, gas-permeable polymeric material can be mountable to a corneal surface of an eye or can be disposed on or within a soft polymeric material that is mountable to the corneal surface of the eye.
1. A device comprising:
an electroactive lens assembly, wherein the electroactive lens assembly comprises an amount of liquid crystal disposed between a first lens and a second lens, and wherein the electroactive lens assembly comprises first and second electrodes to which voltage can be applied to alter an optical power of the electroactive lens assembly;
an electronic circuit, wherein the electronic circuit is electrically coupled to the first and second electrodes of the electroactive lens assembly;
an adhesive, wherein the adhesive is adhered to the first lens and the second lens of the electroactive lens assembly, and wherein the liquid crystal is contained within a combination of the first lens, the second lens, and the adhesive; and
a rigid, gas-permeable polymer layer, wherein the adhesive and the electronic circuit are fully encapsulated by a combination of the rigid, gas-permeable polymer layer and one or more lenses of the electroactive lens assembly, wherein at least one of the first or second lenses of the electroactive lens assembly comprises a rigid, gas-permeable polymeric material.
2. The device of claim 1 , further comprising:
a soft polymer layer, wherein the gas-permeable polymer layer is fully enclosed within the soft polymer layer, wherein the soft polymer layer is mountable to a corneal surface of an eye.
3. The device of claim 2 , wherein the soft polymer layer comprises a silicone hydrogel.
4. The device of claim 1 , wherein the electroactive lens assembly further comprises:
a third lens; and
a further amount of liquid crystal, wherein the further amount of liquid crystal is disposed between the second lens and the third lens, wherein the adhesive is further adhered to the third lens of the electroactive lens assembly, and wherein the further amount of liquid crystal is contained within a combination of the second lens, the third lens, and the adhesive.
5. The device of claim 4 , further comprising:
electronics mounted on the third lens and electrically coupled to control application of the voltage across the first and second electrodes, wherein the electronics are positioned radially outside of the adhesive on the third lens.
6. The device of claim 1 , wherein the first and second lenses of the electroactive lens assembly and the rigid, gas-permeable polymer layer comprise the same rigid, gas-permeable polymeric material.
7. The device of claim 1 , wherein the adhesive comprises a silicone adhesive.
8. The device of claim 1 , wherein the adhesive is immiscible with a precursor material used to form the rigid, gas-permeable polymer layer.
9. The device of claim 8 , wherein the precursor material comprises:
one or more di(meth)acrylate-derived monomeric units; and
one or more (meth)acrylate-derived monomeric units.
10. The device of claim 1 , wherein the device comprises a contact lens for wearing on an eye and the electroactive lens assembly provides adjustable optical power to restore visual accommodation to the eye.