Methods of correcting vision

• US 10,583,041 B2
• Filed: 01/10/2017
• Issued: 03/10/2020
• Est. Priority Date: 03/12/2015
• Status: Active Grant

• Current Assignee: Portable Branding (Pty) Ltd.
• Original Assignee: Portable Branding (Pty) Ltd.
• Inventors: Holliday, Keith, Lang, Alan
• Primary Examiner(s): Prebilic, Paul B
• Application Number:
  US15/403,078
• Publication Number:
  US 20170143544A1
• Time in Patent Office: 1,155 Days
• CPC Class Codes: A61F 2/142 Cornea, e.g. artificial corneae, keratoprostheses or corneal implants for repair of defective corneal tissue
• CPC Class Codes: A61F 2009/00872 Cornea
• CPC Class Codes: A61F 2009/00895 Presbyopia
• CPC Class Codes: A61F 9/00827 Refractive correction, e.g. lenticle
• CPC Class Codes: A61F 9/00834 Inlays; Onlays; Intraocular lenses [IOL]
• CPC Class Codes: A61F 9/00836 Flap cutting
• CPC Class Codes: A61F 9/00838 Correction of presbyopia

Abstract

Methods of correcting vision for presbyopia, including remodeling a stroma with a laser to create an intracorneal shape, where the corneal shape includes a central region with a thickness that is about 50 microns or less measured from an extension of a shape of a peripheral region of the corneal shape, wherein remodeling a portion of the stroma increases a curvature of a central portion of the anterior surface of the cornea with a central elevation change for near vision.

Claims

1. A method of correcting vision for presbyopia, comprising:

creating a lenticule in a stroma of a cornea, wherein creating the lenticule includes creating an anterior lenticule incision and a posterior lenticule incision with a femtosecond laser, wherein the posterior lenticule incision has a central region and a peripheral region, the central region having increased curvature relative to the peripheral region; and

removing the lenticule from the stroma, wherein removing the lenticule increases the curvature of a central portion of an anterior surface of the cornea with a central elevation change for near vision,

wherein removing the lenticule creates a central corneal bump with a thickness that is 3-7 times the central elevation change in the anterior surface of the cornea.

2. The method of claim 1 wherein creating the anterior lenticule incision comprises creating the anterior lenticule incision between 5 microns and 250 microns deep in the stroma.

3. The method of claim 1 wherein removing the lenticule comprises creating a corneal flap.

4. The method of claim 1 wherein the method of correcting vision does not include creating a corneal flap.

5. The method of claim 1, wherein removing the lenticule also treats myopia by flattening the cornea in a peripheral portion that is peripheral to the central portion.