System and method for determining a position for a scleral pocket for a scleral prosthesis
AssigneeRefocus Ocular, Inc.
InventorsRonald A. Schachar, Donald P. Cudmore, William A. Munck
Life of this patent
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Abstract
For use with a surgical tool for making incisions in the sclera of an eye to form a scleral pocket to receive a scleral prosthesis, a system and method is disclosed for determining a position on the sclera for locating the scleral pocket. The system and method determines an optimum location for the scleral pocket. The system and method determines a location on the sclera that represents the intersection of the lens equatorial plane with the external surface of the sclera. The front of the scleral pocket is placed at a location that is four hundred fifty microns posterior to the intersection of the lens equatorial plane with the external surface of the sclera.
Claims21
For use with a surgical tool, an apparatus comprising:
- a controller comprising a processing device, the controller operable to:
- (i) receive eye measurements that measure portions of an eye of a patient;
- (ii) use the eye measurements to create a mathematical model of the eye;
- (iii) determine from the mathematical model of the eye a location, within scleral tissue of the eye, of a scleral pocket that is to receive a scleral prosthesis;
- and (iv) output the determined location;
- wherein the controller is operable to determine the location of the scleral pocket by determining from the mathematical model a location of a lens equatorial plane of the eye and where a projection of the lens equatorial plane actually intersects a sclera of the eye;
- and
- wherein the controller is operable to determine the location of the lens equatorial plane by multiplying a thickness of a lens of the eye by an empirical percentage, the empirical percentage based on an age of the patient.
For use with a surgical tool, a method comprising the steps of:
- receiving eye measurements that measure portions of an eye of a patient at a controller, the controller comprising a processing device;
- using the eye measurements at the controller to create a mathematical model of the eye;
- determining at the controller from the mathematical model of the eye a location, within scleral tissue of the eye, of a scleral pocket that is to receive a scleral prosthesis;
- and
- outputting the determined location;
- wherein determining the location of the scleral pocket comprises determining from the mathematical model a location of a lens equatorial plane of the eye and where a projection of the lens equatorial plane actually intersects a sclera of the eye;
- and
- wherein determining;
- the location of the lens equatorial plane comprises multiplying a thickness of a lens of the eye by an empirical percentage, the empirical percentage based on an age of the patient.
A system comprising:
- a memory configured to store a mathematical model of a patient's eye;
- and
- a processing device configured to:
- determine from the mathematical model of the eye a location, within scleral tissue of the eye, of a scleral pocket that is to receive a scleral prosthesis;
- and
- output the determined location;
- wherein the processing device is operable to determine the location of the scleral pocket by determining from the mathematical model a location of a lens equatorial plane of the eye and where a projection of the lens equatorial plane actually intersects a sclera of the eye;
- and
- wherein the processing device is operable to determine the location of the lens equatorial plane by multiplying a thickness of a lens of the eye by an empirical percentage, the empirical percentage based on an age of the patient.
A method comprising:
- storing a mathematical model of a patient's eye in a memory of a controller, the controller also comprising a processing device;
- determining at the controller from the mathematical model of the eye a location, within scleral tissue of the eye, of a scleral pocket that is to receive a scleral prosthesis;
- and
- outputting the determined location;
- wherein determining the location of the scleral pocket comprises determining from the mathematical model a location of a lens equatorial plane of the eye and where a projection of the lens equatorial plane actually intersects a sclera of the eye;
- and
- wherein determining the location of the lens equatorial plane comprises multiplying a thickness of a lens of the eye by an empirical percentage, the empirical percentage based on an age of the patient.
Dependencies are inferred from the claim text.