Corneal implants and methods and systems for placement
Inactive Publication Date: 2019-12-12
SHIUEY YICHIEH
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[0010]Improved systems and methods for implanting corneal implants are provided by the present invention. The phrase “corneal implant” refers to any natural (biological) or synthetic implant or graft that may be implanted into a human cornea. These systems and methods can place a corneal implant through a corneal incision that is substantially less than the width of the implant. The placement of the implant may be within or between any of the layers of the cornea inclu
Problems solved by technology
Lack of normal nutrient and gas transport could result in undesirable consequences such as melting or necrosis of the corneal tissue.
In alternative preferred aspects, the system may be assembled
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[0067]FIG. 1A shows a top view of a cataract surgery lens implant 2. A round optic 5 of the implant 2 has haptics 10 which extend from the periphery of the optic. The haptics 10 are used to help the optic center and fixate within the capsular bag. FIG. 1B shows a side view of a cataract surgery lens implant optic 5. Note that the thickness t1 of the optic 5 is typically 1 mm or more and is substantially greater than the 0.5 to 0.6 mm thickness of the human cornea. The thickness of the optic 5 makes it inappropriate for use as a corneal lens implant. FIG. 1C shows a top view of a corneal implant 15. Note there are no haptics on the corneal implant. FIG. 1D shows a side view of corneal implant 15. Note that the thickness t2 is substantially less than cataract surgery lens implant 5. The thickness t2 of corneal implant 15 would in general be less than the thickness of the human cornea.
[0068]FIG. 2A shows a corneal implant delivery system 18 in partial section. A hollow member 20 having...
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Abstract
Systems and methods for implanting scaffolds in a corneal pocket of a cornea are provided. In some embodiments, a reversibly deformable scaffold may have a relaxed state and a deformed state. The scaffold may include a first ring and a second ring, a first connector extending from the first ring to the second ring, and a second connector extending from the first ring to the second ring. In some embodiments, a curvature of the first connector and a curvature of the second connector may extend at least partially radially outwardly relative to a central axis of the first ring and the second ring.
Description
CROSS REFERENCES TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 13 / 189,337 filed Jul. 22, 2011, which is a divisional of U.S. patent application Ser. No. 12 / 405,900 filed Mar. 17, 2009 and issued as U.S. Pat. No. 9,999,497, which is a continuation-in-part of PCT / US08 / 61656, filed on Apr. 25, 2008, which is a continuation-in-part of application Ser. No. 11 / 741,496 filed on Apr. 27, 2007 and issued as U.S. Pat. No. 8,029,515, which is a continuation-in-part of application Ser. No. 11 / 341,320, filed on Jan. 26, 2006, which claimed the benefit of provisional application No. 60 / 648,949, filed on Jan. 31, 2005, the full disclosures of which are incorporated herein by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]There are many different types of corneal implants that have been developed for the treatment of refractive error and disease. Because of limitations in the methods of creating corneal pockets, these implants ...
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