The most widely used medical sinusoscopes are rigid endoscopes of varying lengths, insertion tube diameters, and fields of view (FOV). All rigid endoscopes share the same basic design: they feature a circular tube with optical glass lenses at each end.
A rigid endoscope is a fairly simple device without any illumination or image enhancements. Therefore, endoscopic sets often include add-ons that amplify the functions of a rigid endoscope.
These additional tools typically include a portable or standalone light source and an endoscopic camera. The latter is necessary if there exists a need to capture images during a diagnostic procedure or surgery