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Testers designed to check the status of the endoscope optical system including the lenses. These testers consist of a device including a magnifying glass imaging lens, attachment for endoscope eyepieces, and an adapter to video cameras that make possible image observation and documentation of the procedure. Endoscope lens testers are intended to find broken lens (e.g., cracks), dirt surfaces, debris and foreign bodies, lens adhesive degradation, and the evidence of moisture in the optical system; they are used after endoscope operation and/or repair.
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