Functional endoscopic sinus surgery (FESS) is the mainstay in the surgical treatment of sinusitis and nasal polyps, including bacterial, fungal, recurrent acute, and chronic sinus problems. Ample research supports its record of safety and success.
FESS is a relatively recent surgical procedure that uses nasal endoscopes (using Hopkins rod lens technology) through the nostrils to avoid cutting the skin. These endoscopes have diameters of 4mm (adult use) and 2.7mm (pediatric use) and come in varying angles of view from 0 degrees to 30, 45, 70, 90, and 120 degrees. They provide good illumination of the inside of the nasal cavity and sinuses.