Morphometric measurement of horizontal laryngeal structures is difficult and poses many problems in laryngology. It is difficult to determine the size of vocal fold tissue lesions as well as the range of amplitudes during vocal fold vibration in rigid endoscopy. We present a new method by using two parallel light beams which are projected onto the surface of the vocal folds during examination of the larynx with a rigid 90 degrees-endoscope. Because of the fixed distance of the light points, measurement of the laryngeal structures can be accomplished, e.g., using a video print after the examination. With this new technique morphometric measurement of horizontal laryngeal structures during routine endoscopic examination becomes feasible.
