Method for generating a reference information item of an eye, more particularly an optically displayed reference rhexis, and ophthalmic surgical apparatus

A method for generating a reference information item of an eye with the aid of an ophthalmic surgical system for phaco-surgery on the eye, said ophthalmic surgical system including an input unit, an evaluation unit connected to said input unit, an optical display unit connected to said evaluation unit and a capturing device connected between said evaluation unit and said optical display unit, the method comprising:

• inputting at least one characterization information item characterizing at least one of a rhexis size and a rhexis position of a potential actual rhexis on an anterior capsular bag wall of the eye into said input unit of an ophthalmic surgical apparatus;
• passing the characterization information item to said evaluation unit and determining therein, in dependence upon the characterization information item, a reference rhexis as at least a constituent part of the reference information item of the eye;
• optically displaying the determined reference rhexis via said optical display unit of said ophthalmic surgical apparatus;
• capturing via said capturing device, as an intervention information item or items, at least one of a movement of a mechanical tearing tool that is used to lacerate the anterior capsular bag wall and a previously produced tear line of a performed actual rhexis and/or determining a tear line of a rhexis that may occur in the future;
• determining, depending on at least one of said intervention information items, at least one of a deviation of the actual rhexis from the determined and optically displayed reference rhexis that has already occurred and a deviation of the actual rhexis from the determined and optically displayed reference rhexis that may occur in the future;
• further comprising at least one of:
• generating a warning message when a deviation is greater than a tolerance value;
• changing a color of the displayed reference rhexis at least in a length region in which the deviation has occurred or could occur;
• and, presenting the reference rhexis in a flashing fashion at least in the length region in which the deviation has occurred or could occur.

A method for generating a reference information item of an eye with the aid of an ophthalmic surgical system for phaco-surgery on the eye, said ophthalmic surgical system including an input unit, an evaluation unit connected to said input unit, an optical display unit connected to said evaluation unit and a capturing device connected between said evaluation unit and said optical display unit, the method comprising:

• inputting at least one characterization information item characterizing at least one of a rhexis size and a rhexis position of a potential actual rhexis on an anterior capsular bag wall of the eye into said input unit of an ophthalmic surgical apparatus;
• passing the characterization information item to said evaluation unit and determining therein, in dependence upon the characterization information item, a reference rhexis as at least a constituent part of the reference information item of the eye;
• optically displaying the determined reference rhexis via said optical display unit of said ophthalmic surgical apparatus;
• capturing via said capturing device, as an intervention information item or items, at least one of a movement of a mechanical tearing tool that is used to lacerate the anterior capsular bag wall and a previously produced tear line of a performed actual rhexis and/or determining a tear line of a rhexis that may occur in the future;
• determining, depending on at least one of said intervention information items, at least one of a deviation of the actual rhexis from the determined and optically displayed reference rhexis that has already occurred and a deviation of the actual rhexis from the determined and optically displayed reference rhexis that may occur in the future;
• further comprising:
• determining a preferred movement of the mechanical tearing tool during a further laceration in the case of a deviation greater than a tolerance value;
• and,
• optically displaying the preferred movement on the display unit.

An ophthalmic surgical system for phaco-surgery on the eye, said ophthalmic surgical system comprising:

• an input unit configured for inputting at least one characterization information item characterizing at least one of a rhexis size and a rhexis position of a potential and desired actual rhexis on an anterior capsular bag wall of the eye;
• an evaluation unit connected to said input unit for receiving said characterization information item and being configured to determine, in dependence upon the characterization information item, a fictitious reference rhexis as at least a constituent part of a reference information item of the eye independently of an actual surgical intervention to be subsequently performed;
• an optical display connected to said evaluation unit and being configured to optically display the determined fictitious reference rhexis via an optical display unit of the ophthalmic surgical apparatus;
• and,
• a capturing device connected between said evaluation unit and said optical display and being configured to capture, as an intervention information item, at least one of a movement of a mechanical tearing tool that is used to lacerate an anterior capsular bag wall and a previously produced tear line of a performed actual rhexis and/or determining a tear line that may occur in the future;
• and,
• said evaluation unit being further configured to determine, depending on at least one of said intervention information items, at least one of a deviation of the actual rhexis from the determined and optically displayed fictitious reference rhexis that has already occurred and a deviation of the actual rhexis from the determined and optically displayed fictitious reference rhexis that may occur in the future.