A representation of the skull (“a mask”) based upon imaging of the head enables simulation of surgical procedures. The mask is limited in extent to a zone extending above the inferior boundary of the maxilla in the axial plane, between the outer limits of the zygomatic bones in the sagittal plane, and anterior to the coronal suture of the skull in the coronal plane, and includes orbits and a nasal opening. The mask is detachably connected to a posterior base. The base includes a fluid retaining surface which forms a basin. A peripheral edge slidingly mates with a posterior portion of the mask to enable rotation of the mask. The base has a mounting surface for eye models that is posterior to each of the mask orbits. A drain port enables drainage from the base. A nasal structure resembling a nose is reversibly insertable into the nasal opening.