An optical film of the invention comprises a polarizing Plate, in which a transparent protective film is laminated on both sides of a polarizer, and plural retardation films so that an absorption axis of the polarizing plate is perpendicular or parallel to slow axes of the plural retardation films and the slow axes of the plural retardation films are parallel to one another. The disclosed support structure design induces buckling in the door handle supports while continuing to provide acceptable durability and strength. The tool tracking registration implements a representation within the pre-operative scan image andor the intra-operative fluoroscopic image of a tracking of one or more surgical tools within the intra-operative endoscopic image.