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Knife Test Drums, Ophthalmic

Definition : Devices designed for testing the sharp penetrating point of surgical knives used in ophthalmic procedures. These devices typically consist of two concentric cylinders made of materials such as wood or plastics; the external cylinder is large enough to slip over the smaller internal one. When properly placed, a piece of soft material is adjusted on the outer cylinder in the same way as the raw skin is drawn upon a drum head. The knives are tested by pressing the point gently against the surface of the soft material (e.g., kidskin, sheepskin). The point will penetrate easily and smoothly without any sound if the knife is sharp; imperfect cutting and a popping sound are signs that the knife needs sharpening or should be discarded.

UMDC code : 16475

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