Biocompatible materials for underlid device fabrication
An eye-mountable composition, an eye-mountable device and a method for making the eye-mountable device are disclosed. In one aspect, an eye-mountable composition is disclosed, which may include a silicone hydrogel having silicon-containing monomer-derived units and hydrophilic monomer-derived units, a non-silicone hydrogel having non-silicon-containing hydrophobic monomer-derived units and hydrophilic monomer-derived units, or an elastomer. The composition is biocompatible, does not adhere to ocular tissue, and has a modulus of elasticity of 0.2 MPa to 10 MPa. Also provided is an eye mountable device including an electronics platform embedded in an eye-mountable composition, and a method for fabricating the eye-mountable device.
1. An eye-mountable composition, comprising a non-silicon-containing hydrogel comprising:
non-silicon-containing hydrophobic monomer-derived units, wherein the non-silicon-containing hydrophobic monomer-derived units comprise (i) an alkylene oxide (meth)acrylate-derived monomeric unit and (ii) a fluorinated methacrylate-derived monomeric unit; and
hydrophilic monomer-derived units,
wherein the non-silicon-containing hydrogel includes 15-30 wt. % of one or more di(meth)acrylate-derived monomeric units, and 60-85 wt. % of one or more (meth)acrylate-derived monomeric units; and
wherein the non-silicon-containing hydrogel has a water content of 5 weight percent to 90 weight percent and a modulus of elasticity of 0.2 MPa to 10 MPa.
2. The eye-mountable composition of claim 1 , wherein the hydrogel has a water content of 75 weight percent to 90 weight percent.
3. The eye-mountable composition of claim 1 , wherein the composition has a modulus of elasticity of 0.2 MPa to 5 MPa.
4. The eye-mountable composition of claim 1 , wherein the composition has a modulus of elasticity of 0.2 MPa to 1 MPa.
5. The eye-mountable composition of claim 1 , wherein the non-silicon-containing hydrophobic monomer-derived units of the hydrogel further comprise alkyl-containing (meth)acrylate-derived monomeric units with alkyl groups having 1 to 4 carbon atoms per group.
6. An eye-mountable device, comprising an electronics platform embedded in the eye-mountable composition of claim 1 .
7. An eye-mountable composition, comprising:
an elastomer, wherein the elastomer comprises a silicone elastomer, wherein the silicone elastomer includes polyurethane-polysiloxane macromonomers and styrene-isoprene-butadiene-styrene,
wherein the composition has a modulus of elasticity of 0.2 MPa to 10 MPa.
8. The eye-mountable composition of claim 7 , wherein the elastomer further comprises a hydrophobic acrylic, wherein the hydrophobic acrylic has a (meth)acrylate-derived unit having a hydrophobic side chain.
9. The eye-mountable composition of claim 8 , wherein the hydrophobic side chain is linear or branched C 12 alkyl.
10. An eye-mountable device, comprising an electronics platform embedded in the eye-mountable composition of claim 7 .
11. A method for fabricating the eye-mountable device of claim 6 , method comprising:
forming a monomer mixture comprising a non-silicon-containing hydrophobic monomer and a hydrophilic monomer;
depositing the monomer mixture on an electronics platform; and
curing the monomer mixture to provide the eye-mountable device.
12. A method for fabricating the eye-mountable device of claim 10 , the method comprising:
forming a monomer mixture comprising an elastomer precursor;
depositing the monomer mixture on an electronics platform; and
curing the monomer mixture to provide the eye-mountable device.