![]() Many times the residual rust will migrate to the surface of the eye itself, usually within 24 hours. The rust ring may persist even after the foreign body is removed leaving a stain on the cornea. Complete rust ring formation can be after about 8 hours. The reaction begins within 2 to 4 hours of the foreign body embedding in the eye. The salt in tears interacts with the iron in the metal forming rust in the eye just like you see with metal left outdoors in the elements. METAL FRAGMENTS MEANING UPDATEDon’t forget to update the patient’s tetanus immunization if necessary.Ī rust ring may form around foreign bodies that contain iron, typically those that are metallic. METAL FRAGMENTS MEANING PATCH
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