In addition, determining the type of infection will most likely require some sort of lab work. If your doctor suspects pre-suptal cellulitis, he or she may wish to test samples from the nose or even the eye itself. However, if orbital cellulitis is suspected, a blood test is likely. In some cases, your doctor may also wish to obtain a CT or other scan of the area. These images will help your doctor determine the extent of any infection in the orbit.