Orbital Surgery Download PDF, 1.80MB, PDF Orbital Surgery involves the area of the orbit (eye socket). This area (orbit) is bound by the bones surrounding the eyeball. It is close to several important structures within the skull, including the sinuses and the brain. You will need an orbital surgery:To repair an orbital fractureTo remove a tumourTo do a biopsy of the tissue in the orbitTo remove the source of an infectionTo decompress the orbit to relieve the pressure on the optic nerve [Please download the PDF file if you are unable to view the image below.]