A review of the records of 72 patients who had orbital floor fractures repaired with silicone subperiosteal implants at the Massachusetts Eye and Ear Infirmary during the years 1966 to 1970 disclosed six cases in which vision was lost possibly as a result of the surgical procedure. Two of the six patients had postoperative orbital hemorrhage with loss light perception which returned after prompt decompression of the orbit by removal of the silicone implant. In a third patient permanent loss of light perception probably resulted from trauma to the optic nerve; a fourth patient developed central retinal artery occlusion; a permanent altitudinal field defect and reduction in visual acuity occurred in a fifth patient; and the sixth patient's light perception returned toward normal as the orbital turgidity spontaneously resolved.
Nicholson DH, Guzak SV. Visual Loss Complicating Repair of Orbital Floor Fractures. Arch Ophthalmol. 1971;86(4):369–375. doi:10.1001/archopht.1971.01000010371003