Eye wall anchored fixtures
Eye wall anchored fixtures each including at least one elongated anchor member for driven lengthwise insertion into an eye's eye wall in a transverse direction to its thickness for supporting an intraocular device in the eye's vitreous cavity. Fixtures are preferably anchored in circumferential incisions in a human adult eye's pars plana preferably 3.5 mm posterior to its corneal limbus, and perpendicular to a circumferential incision. The fixtures are either generally L-shaped with a single elongated anchor member designed for withdrawal from an eye wall or self-anchoring thereinto, or generally T-shaped with a pair of oppositely directed self-anchoring elongated anchor members for sealing a throughgoing incision. Intraocular devices can be designed for intraocular drug delivery, for acquiring intraocular physiological measurements, and the like.
1. An eye wall anchored fixture for implantation in an eye having an eye wall with inner and outer surfaces and a vitreous cavity, the fixture comprising an L-shaped element including at least one elongated anchor member for driven lengthwise insertion of said one anchor member into the eye wall so that said one anchor member extends and is completely embedded lengthwise in the eye wall tissue, in a direction substantially transverse to the dimension between the inner and outer surfaces of the eye wall, each said at least one elongated anchor member having a length in the range of about 1 mm to about 3 mm, and a diameter in the range of about 100 μm to about 200 μm, and a support member mounted on said at least one elongated anchor member for supporting an intraocular device in the eye's vitreous cavity.
2. The fixture according to claim 1 wherein said length is in the range of 2 mm±0.50 mm.
3. The fixture according to claim 1 wherein said diameter is in the range of 150 μm±10 μm.
4. The fixture according to claim 1 wherein said at least one elongated anchor member includes a single elongated anchor member with a self-anchoring leading end for anchoring the fixture in an eye wall on its driven lengthwise insertion there into.
5. The fixture according to claim 1 wherein said L-shaped anchor member comprises a second anchor portion to form a T-shaped anchor member that includes a pair of oppositely directed elongated anchor portions, each with a self-anchoring leading end whereby the fixture is capable of sealing a throughgoing incision in an eye wall via which it is implanted therein.
6. The fixture according to claim 1 wherein said support member is integrally formed with said intraocular device.
7. The fixture according to claim 6 wherein said intraocular device administers an intraocular drug.
8. The fixture according to claim 6 wherein said intraocular device acquires intraocular physiological measurements.
9. The fixture according to claim 1 wherein said support member includes an attachment device for supporting a discrete intraocular device in an eye's vitreous cavity.
10. The fixture according to claim 1 wherein said support member includes a multitude of discrete drug containing capsules therealong for individually releasing their contents into an eye's vitreous cavity.
11. The fixture according to claim 10 wherein said support member includes sealing self-anchoring fixtures at its opposite ends.
12. The fixture according to claim 10 wherein said multitude of discrete drug containing capsules are enclosed by a soft silicone sheath.
13. The fixture according to claim 10 wherein said drug containing capsules have external shells formed from self degradable biocompatible material for controlled drug release.
14. The fixture according to claim 10 wherein said drug containing capsules have external shells formed from non degradable biocompatible material intended for selective rupturing by external means.
15. A method for anchoring a fixture for a implantation of an intraocular device in an eye having an eye wall with inner and outer surfaces and a vitreous cavity, comprising the steps of inserting an L-shaped element including at least one elongated anchor member by inserting said anchor member lengthwise into the eye wall so that said one anchor member extends and is completely embedded lengthwise in the eye wall tissue in a direction substantially transverse to the dimension between the inner and outer surfaces of the eye wall.
16. The method according to claim 15 wherein said L-shaped anchor member comprises a second anchor portion to form a T-shaped anchor member that includes a pair of oppositely directed elongated anchor portions, each with a self-anchoring leading end whereby the fixture is capable of sealing a throughgoing incision in an eye wall via which it is implanted therein.