Method and intra sclera implant for treatment of glaucoma and presbyopia

• US 8,267,995 B2
• Filed: 08/02/2002
• Issued: 09/18/2012
• Est. Priority Date: 08/03/2001
• Status: Expired due to Fees

• Current Assignee: Glaucoma Research Technologies Incorporated
• Original Assignee: Glaucoma Research Technologies Incorporated
• Inventors: Castillejos, David
• Primary Examiner(s): Willse, David H
• Assistant Examiner(s): BLANCO, JAVIER G
• Application Number:
  US10/211,197
• Publication Number:
  US 20040024453A1
• Time in Patent Office: 3,700 Days
• Field of Search: 623/4.1, 604/8
• US Class Current: 623/4.1
• CPC Class Codes: A61F 2/147 Implants to be inserted in the stroma for refractive correction, e.g. ring-like implants
• CPC Class Codes: A61F 9/00781 Apparatus for modifying intraocular pressure, e.g. for glaucoma treatment drainage implants in general A61M27/002

Abstract

An intra scleral implant and method of implantation for use in the treatment of intraocular pressure and presbyopia. The implant features a body portion and protrusions from the body portion to anchor the device in a cavity formed in the scleral wall of the eye. Optionally a drug delivery function is provided to allow long term communication of drugs to tissue surrounding the implant.

Claims

1. A method for lowering the intraocular pressure of an eye or treating presbyopia by surgically placing an implant comprising the steps of:

making a small limited conjunctival peritomy in the eye to expose the sclera;

making a plurality of four elongated incisions, each oriented in a radial direction of the eye, in the anterior sclera to form four scleral flaps;

positioning a plurality of four elongated scleral implants, each having a body with a longitudinal axis, within the spaces formed by the radially oriented incisions such that the longitudinal axis of each of said elongated scleral implants is oriented in said radial direction of the eye, in said incisions; and

reattaching the scleral flap over each of said elongated scleral implants, to the sclera, and suturing each of said incisions to thereby form a cavity within the sclera completely surrounding each of said elongated scleral implants, whereby tension is imparted to said sclera by stretching of said sclera surrounding said body to form said cavity to accommodate said body positioned therein and a stretching of said flap over said body for said reattaching, thereby aiding in relieving said intraocular pressure by enhancing natural fluid flow to the trabecular meshwork of the eye;

wherein each of said scleral implants comprises means to anchor each body in each of said elongated incisions, whereby movement of said elongated body in said elongated incision is substantially prevented.

2. The method of claim 1, wherein said implants additionally comprise:

means to communicate a drug dose to surrounding tissue from an implant-resident supply of said drug.

3. The intra-scleral implant of claim 1, wherein each of said bodies is formed of substantially inert material when implanted.

4. The intra-scleral implant of claim 1, wherein each of said bodies is formed of silicone or acrylic and has a low coefficient of thermal expansion.