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Corneal abrasion burs designed for gentle removal (\'brushing\') of rust stains (rust rings) from the cornea after the extraction of a ferrous foreign object. They typically consist of a shank of steel or other hard metal with a well-differentiated brush-like working tip and a proximal end to fit into a rotary handpiece, typically a slow-rotation electrically powered ophthalmic device (e.g., an ophthalmic electric spud).
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