Injury of the eyeball from the penetration of foreign bodies has become more frequent during the past decade, as a result of the increased number of laborers engaged in the metal industries, and, to some extent, probably owing to the substitution of steel, with its hard, granular and easily fractured structure, for the tough and fibrous wrought iron previously used in manufactures. The majority of bodies entering the eye are of iron or steel, but occasionally small shot, copper, pieces of glass or coal strike the ball with sufficient force to penetrate into the interior.
When the eye is struck by a piece of metal, the size of the particle, its shape and the force with which it travels affect the character of the injury to the structures of the globe. A large piece of metal may cause serious injury from contusion, or may penetrate the cornea and lens, without
SWEET WM. FOREIGN BODIES IN THE EYE. JAMA. 1902;XXXIX(9):467–469. doi:10.1001/jama.1902.52480350005001a
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