The appreciation that the posterior ethmoidal cells and the sphenoidal sinus are the causative factors in many of the optical nerve disorders has centered attention on this region. Formerly, the anterior ethmoidal cells held the center of the stage in our attention because of their relationship to the frontal sinus. The older operations were so designed that the anterior cells were first attacked and were more thoroughly exenterated at the expense of an uncertainty of thoroughness in the posterior region. If the sphenoidal sinus and the posterior ethmoidal cells are the important factors, then the successful operation must be based on thoroughness in their exenteration. In like manner, the curet, guided by the sense of touch, must give way to the trustworthy biting forceps, controlled by the sense of sight. The fundamental law of safe ethmoidal and sphenoidal surgery is to work by sight only, avoiding tearing by accomplishing each
SHEA JJ. A COMPARATIVE STUDY OF ETHMOIDAL AND SPHENOIDAL OPERATIONS. JAMA. 1922;79(3):203–208. doi:10.1001/jama.1922.02640030029009
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