Gonioscopy

Definition of gonioscopy
National Cancer Institute

gonioscopy

(GOH-nee-OS-koh-pee)
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.

Source: NCI Dictionary of Cancer Terms