Method of refractive surgery

• US 5,970,984 A
• Filed: 10/23/1997
• Issued: 10/26/1999
• Est. Priority Date: 05/10/1993
• Status: Expired due to Fees

• Current Assignee: Eyesys Vision, Inc.
• Original Assignee: Eyesys-Premier, Inc.
• Inventors: Pallikaris, Ioannis G., Wakil, Youssef Salih, Thornton, Spencer P.
• Primary Examiner(s): Yu, Mickey
• Assistant Examiner(s): O'Hara, Kelly
• Application Number:
  US08/956,878
• Time in Patent Office: 733 Days
• Field of Search: 128/898, 606/166, 351/205, 351/206, 351/212, 600/300, 600/301
• US Class Current: 128/898
• CPC Class Codes: A61B 3/107 for determining the shape or measuring the curvature of the cornea
• CPC Class Codes: A61F 9/007 Methods or devices for eye surgery
• CPC Class Codes: A61F 9/013 Instruments for compensation of ocular refraction A61F9/008 takes precedence; Instruments for use in cornea removal, for reshaping or performing incisions in the cornea

Abstract

A novel method and apparatus is presented for the performance of refractive surgery. The success of refractive surgery, particularly astigmatic refractive surgery varies with the intuition and skill of the surgeon yielding a consistency of results more typical of art than science. In the described embodiments methods and apparatus that quantify refractive surgery by determining the nature of incisions are based upon traceable and repeatable factors. The described embodiments incorporate hardware and software for use in the data management.

Claims

1. A Method of refractive surgery which comprises forming incisions at various locations in the cornea the method of refractive surgery comprising:

examining an eye with a corneal topographer to obtain at least some corneal topography data;

selecting appropriate optical zones and constructing correlative dioptric power curves based on the at least some corneal topography data;

locating locations for incisions in the cornea in accordance with the data of the dioptric power curves and

forming the incisions at the incision locations to perform the refractive surgery.

2. The method of claim 1 further comprising evaluating one or more patient factors and wherein the incisions are located on the cornea in accordance with the dioptric power curve and the one or more patient factors.

3. A method of refractive surgery comprising:

examining an eye with a corneal topographer to obtain corneal topographic data;

creating dioptric power curves along appropriate optical zones based on the corneal topography data;

deciding total length and location distribution of corrective incisions; and

executing the incisions.

4. A method of claim 3 where said total length and location distribution of corrective incisions is decided based upon a mean dioptric power value between neighboring astigmatic axes.

5. A method of claim 3, further comprising performing an area under the curve analysis of the corneal topography data and where said total length and location distribution of corrective incisions is decided based upon an area under the curve analysis.

6. A method of claim 3 further comprising performing an inflection point analysis of the corneal topography data so that the total length and location distribution of corrective incision is analyzed by inflection point where the total length and location distribution of corrective incisions is decided based upon an inflection point analysis.