Apparatus and method for performing presbyopia corrective surgery

A presbyopic corrective software or hardware package that comprises data store means and directive means for directing a formation of a predetermined ablation corneal stroma profile in accordance with parameters a-b which are as follows:

• a). 1.4-1.8 mm for the diameter value of a central most region of the corneal stroma to remain unablated;
• and
• b). 2.4-3.2 mm for an outer diameter of a maximum ablation depth ring.

A presbyopia correction system, comprising:

• a corneal stroma tissue removing system which includes means for removing tissue and control means for providing presbyopic correction to an exposed corneal stroma of any eyes and wherein said control means includes directive means for formation of an annular ablation region in the corneal stroma which utilizes a profile represented by the following:
• G(X)=F(X)+F(X)*(k3/10+factor/k3)*arctan (factor−1).

A presbyopia correction system, comprising:

• a corneal stroma tissue removing system which includes means for removing corneal stroma tissue and control means for providing presbyopic correction to an exposed corneal stroma of an eye and wherein said means for removing tissue includes a laser system and said control means includes directive means for directing a formation by said laser system of an ablation region, and wherein said ablation region is based on an ablation profile which includes an ablation avoidance central zone having a central reference point which is off-centered with respect to an optimal axis of a pupil of an eye, with the central reference point being within a nasal-superior quadrant of the pupil of the eye;
• and
• an information converter for converting received information concerning the eye to establish the central reference point within the nasal superior quadrant of the eye for use by the said means for directing a formation by said laser system of an ablation region.

A presbyopic correction system, comprising:

• a corneal stroma tissue removing system which includes a laser system;
• control means for controlling energy application by said laser system with respect to a preexposed corneal stroma, with said control means including directive means for defining a corneal stroma ablation pattern in the stroma based on an ablation profile which includes an ablation avoidance central zone having a diameter 1.3 or greater and a maximum ablation depth zone extending from a periphery of the central zone and including a first sloped profile section extending downward to a maximum ablation point of the profile, and said profile having a second sloped profile section extending upward from the maximum ablation point, and wherein said first slope is steeper than said second slope and shorter in length.

A presbyopia correction method, comprising:

• determining a center reference point within a nasal-superior quadrant of the pupil of the eye;
• and
• removing exposed corneal stroma of an eye with a laser system by directing a formation by said laser system of an ablation region based on an ablation profile which includes an ablation avoidance central zone having the central reference point which is off-centered with respect to an optical axis of a pupil of an eye and within the nasal-superior quadrant of the pupil of the eye.

A presbyopia correction system, comprising:

• a corneal stroma tissue removing system which includes means for removing corneal stroma tissue and control mews for providing presbyopic correction to an exposed corneal stroma of an eye and wherein said means for removing tissue includes a laser system and said control means includes directive means for directing a formation by said laser system of in ablation region, and wherein said ablation region is based on an ablation profile which includes an ablation avoidance central zone having a central reference point which is off-centered with respect to an optical axis of a pupil of an eye, with the central reference point being within a nasal-superior quadrant of the pupil of the eye, and wherein directing a formation includes forming an ablation ring about the central zone with the central zone having a diameter of 1.4 mm to 1.8 mm and a central point corresponding with said central reference point.