. A treatise on the diseases of the eye. After Mackenzie. After Mackenzie.] supervene upon inflammation of the cellular tissue of the orbit, accompaniedby periostitis. Sometimes the caries is confined to the margin of the orbit,or it occurs just within the cavity near the edge. In such cases, the upperor lower lid, according to circumstances, may become extensively involvedin the cicatrix, and a very considerable ectropium result [Figs. 245 and 246].These cases of caries and necrosis of the margin of the orbit are generallythe result of a blow or fall upon this part, and are frequently met wit


. A treatise on the diseases of the eye. After Mackenzie. After Mackenzie.] supervene upon inflammation of the cellular tissue of the orbit, accompaniedby periostitis. Sometimes the caries is confined to the margin of the orbit,or it occurs just within the cavity near the edge. In such cases, the upperor lower lid, according to circumstances, may become extensively involvedin the cicatrix, and a very considerable ectropium result [Figs. 245 and 246].These cases of caries and necrosis of the margin of the orbit are generallythe result of a blow or fall upon this part, and are frequently met with inchildren, more particularly those of a scrofulous diathesis. Syphilis is afrequent cause of caries of the orbit, and the disease of the bone may in suchcases be due to an extension of the aflfection from the nasal fossae. [See apaper by the Editor in the Trans, of the New York Academy of Medicinefor 1881.—B.] The principles of treatment should resemble those recommended forperiostitis. The pus should be evacuated as early as possi


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