Method of refractive surgery

• US 5,722,427 A
• Filed: 12/13/1994
• Issued: 03/03/1998
• Est. Priority Date: 05/10/1993
• Status: Expired due to Fees

• Current Assignee: Eyesys Vision, Inc.
• Original Assignee: Eyesys Technologies, Inc. (Premier Laser Systems, Inc.)
• Inventors: Pallikaris, Ioannis G., Thornton, Spencer P., Wakil, Youssef Salih
• Primary Examiner(s): Bahr, Jennifer
• Assistant Examiner(s): GILBERT, SAMUEL G
• Application Number:
  US08/355,436
• Time in Patent Office: 1,176 Days
• Field of Search: 128/898, 128/630, 351/212, 351/205, 351/206, 606/166
• 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 an than science. The invention comprises methods and apparatus that quantify refractive surgery by determining the nature of incisions based upon traceable and repeatable factors. The invention incorporates hardware and software for use in the data management.

Claims

1. A method for displaying dioptric powers of the corneal surface of an eye wherein the eye has a visual axis and a vertex where the visual axis intersects the corneal surface, comprising:

a) zoning the corneal surface into a plurality of parallel zones extending around the visual axis of the eye and at different radial distances from the vertex; and

b) generating a dioptric power curve for each said zone, said curve comprising the dioptric powers at spaced intervals along the zone.

2. The method of claim 1 wherein the dioptric power curve is in the form of a linear trace correlating the dioptric powers with their positions along the zone.

3. The method of claim 1 which further comprises:

a) using the dioptric power curves in preparing for refractive eye surgery.

4. A method for displaying dioptric powers of the corneal surface of an eye wherein the eye has a visual axis and a vertex where the visual axis intersects the corneal surface, comprising:

a) zoning the corneal surface into a plurality of parallel zones extending around the visual axis of the eye and at different radial distances from the vertex; and

b) topographically surveying the corneal surface to determine the dioptric powers for each said zone at spaced intervals along the zone; and

c) generating a dioptric power curve for each said zone, said curve comprising the dioptric powers at said spaced intervals along the zone.

5. The method of claim 4 which further comprises:

a) using the dioptric power curves in preparing for refractive eye surgery.

6. The method of claim 4 wherein the dioptric power curve is in the form of a linear trace correlating the dioptric powers with their positions along the zone.