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April 1983

Particulate Contamination in Disposable Corneal Trephines

Author Affiliations

From the Departments of Ophthalmology, Mount Sinai School of Medicine, New York (Dr Pardos), and Washington University School of Medicine, St Louis (Dr Meltzer). Dr Pardos is now in private practice in Denver.

Arch Ophthalmol. 1983;101(4):562-563. doi:10.1001/archopht.1983.01040010562005

• In two cases scheduled for corneal transplantation, edges of donor corneal buttons were discolored by a black contaminant transferred from the disposable trephines. Trephines from two different manufacturers produced this same problem. Scanning electron microscopy and energy-dispersive x-ray analysis indicated that the contaminant was a mixture of stainless steel particles from the trephine and silicon carbide abrasive used in sharpening.