<unk>  is using a goniolens (also known as a<unk>  together with a slit lamp or operating microscope to view the iridocorneal angle, or the anatomical angle formed between the eye's cornea and iris. Its use is important in diagnosing and monitoring various eye conditions associated with glaucoma.
Gonioscopy
Rhinoscope
Videostroboscopy
Falloposcopy
Keratoscope
Focal plane tomography
Nasoendoscopy
Photoglottography