Dye injection studies of intraorbital fat compartments.

Injections of dye into the orbits of cadavers was followed by diffusion of the dye throughout the orbital fat, and confirms the findings of Hugo and Stone. We also found that the muscles and everything else in these orbits were stained. In contrast, however, when we injected individual fat compartments in patients undergoing blepharoplasty, the dye stained only the fat in that compartment. The pattern of the staining confirmed the existence of two fat compartments in the upper eyelid and 3 fat compartments in the lower eyelid, as described by Castanares.