Even with the increased stability that can be accomplished today in laryngoscopy, there are still areas of doubt and inaccuracy. One of the most evident of these is represented in the shortcomings of monocular vision through a laryngoscope. Some compensation can be developed for this in most experienced and expert hands. However, for the average laryngologist a sense of depth is never present, and when a forceps is introduced, there is a corresponding amount of inaccuracy and poor marksmanship when reaching for the sometimes elusive polyp or papilloma. Binocular vision down the tube greatly reduces these difficulties.
This concept of binocular vision is not completely new. Rather than the birth of a
Fig. 1.—The use of the depth perceptor through the laryngoscope. new idea, this instrument represents a resurrection of one formerly used, but to a very limited extent in this country and abroad. The basic optical system is similar
ROBERT B. LEWY. Depth Perception in LaryngoscopyReport of an Instrument Used to Accomplish Binocular Vision Through a Tube. Arch Otolaryngol. 1960;72(3):383–384. doi:10.1001/archotol.1960.00740010391020