To the Editor.
—Examination of the internal nasal anatomy should be done before, during, and after surgery when dacryocystorhinostomy (with or without Jones' tubes) or excision of naso-orbital tumors is anticipated. Unrecognized nasal pathologic conditions may compromise an otherwise well-planned surgical procedure.Intranasal examination requires adequate illumination. However, it may be difficult to direct light into the nasal passage, as the examiner may inadvertently block a remote illumination source. Although the simple otoscope provides adequate illumination to view the intranasal structure, the field of view is often far inferior to that provided by fiberoptic headlamp systems used in ear, nose, and throat surgery. The indirect ophthalmoscope provides an excellent source of illumination and is often more readily available to ophthalmologists than a fiberoptic headlamp system. A simple technique to enhance visualization of intranasal structure using the indirect ophthalmoscope is reported herein. This technique provides excellent illumination and stereopsis with the
Beyer TL, Dryden RM. Indirect 'Nasoscopy'. Arch Ophthalmol. 1987;105(12):1627. doi:10.1001/archopht.1987.01060120025007
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