Medical virtual reality, mixed reality or agumented reality surgical system

A virtual reality system, comprising:

• memory configured to receive and store original patient-specific medical data;
• a headset configured to present the original patient-specific medical data as a first three-dimensional visual image to a user;
• at least one hand unit configured to receive first input from the user applying a virtual medical device to the original patient-specific medical data;
• a processor configured to receive the original patient-specific medical data, and to receive the first input, and to generate updated patient-specific medical data as a function of the original patient-specific medical data and the first input;
• wherein the headset is further configured to present the updated patient-specific medical data as a second three-dimensional visual image;
• wherein the processor is further configured to compute a metric as a function of the updated patient-specific medical data and a standard;
• and
• wherein the headset is further configured to present the metric to the user.