Localization of intraocular foreign bodies is of prime importance not only for their successful extraction but for the preservation of the greatest amount of vision. Without knowing the exact location of a foreign body, one would be at a loss as to where to make an incision and in which direction to insert the point of the magnet or, if one is dealing with a nonmagnetic foreign body, where to search for it. In fact, a roentgenogram taken without a localizer is of little value because it cannot show even whether the foreign body is within the eyeball.
In the past there has been excellent work done by localizers such as the one devised by the late Dr. Sweet. However, one of the drawbacks to their use has been their cost, which has prevented many a hospital and roentgenologist from owning one, especially considering the fact that it is not
YAZUJIAN DM. LOCALIZATION OF INTRAOCULAR FOREIGN BODIES. Arch Ophthalmol. 1940;24(5):975–979. doi:10.1001/archopht.1940.00870050125010
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