<unk>  is performed by two procedures. * Anterior<unk>  using a nasal speculum * Posterior<unk>  using an endoscopic<unk>  Anterior<unk>  In anterior<unk> , the<unk>  is advanced through the nose to examine the nasal cavity. Posterior<unk>  In posterior<unk> , the endoscope is advanced through the mouth to examine the back of the nasal cavity above the soft palate, and can be used to visualise the oropharynx below that. structures seen in posterior<unk>  -posterior border of nasal septum, fossa of roosenmuller, eustachian tube opening, upper surface of soft palate.
Rhinoscope
Keratoscope
Otoscope
Fetoscope
Stroboscope
Videoscope
Thermoacoustic imaging
Real ear measurement