The use of various implant materials for correcting subluxation of the globe and restoring maxillary contour in fractures of the orbital floor has been under constant consideration by ophthalmic surgeons. Impetus for such investigation has been provided particularly by World War II, when many defects of this type presented themselves in casualties from high-explosive shells, land-mine explosions, and other causes. A survey of the possible means of correcting such defects discloses a variety of implant materials and techniques, many of which have offered indifferent results, and others hold promise of providing a satisfactory solution to the problem. From the abundance of implant agents which have been employed, a few might be mentioned. Fresh costal cartilage is recommended by Spaeth1 to be placed, when possible, beneath the periosteum in order to lift the eye. Pierce * uses cartilage from the cadaver. Fat implants, it is generally agreed, undergo a certain amount