In a previous article1 I described the light-carrier and lens in the following terms:
It aims to meet those cases in which treatment requires dryness and applications, such as would be available through the old straight-tube urethroscopes, as the Chetwood pattern, for example. Any one having the Chetwood and the Buerger instruments might essay to avoid purchasing this extra attachment. The difficulty, however, is that of recognizing with the older instruments the exact point discovered with the Buerger instrument. After about a half year's use of this attachment, however, I am convinced of its serviceability. With the great aid of the magnification and irrigation of the Buerger instrument a definite lesion is located. The telescope is then removed without disturbing the sheath of the instrument, and the urethra is mopded dry. The attachment is then inserted and by means of its eye-piece, which repeats the degree of enlargement of the Buerger telescope, the lesion is again recognized. The magnifying eye-piece is then removed and
PEDERSEN VC. A LIGHT-CARRIER WITH LENS AND A RHEOSTAT FOR URETHROSCOPY. JAMA. 1913;60(3):182–183. doi:10.1001/jama.1913.04340030012007
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