NCIt definition : Examination of the anterior chamber and the iridiocorneal angle using a specialized
video camera (gonioscope) and a slit lamp.;
Alternative definition : NCI-GLOSS: A procedure in which a gonioscope (special lens) is used to look at the
front part of the eye between the cornea (the clear layer) and the iris (the colored
part of the eye). Gonioscopy checks for blockages in the area where fluid drains out
of the eye.;