• 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.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• A test used to detect glaucoma that examines the area where fluid drains out of the eye.
  Harvard Dictionary of Health Terms
  Harvard Medical Publishing, 2011
• Examination of the angle of the anterior chamber of the eye with a specialized optical instrument (gonioscope) or a contact prism lens.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• Examination of the anterior chamber and the iridiocorneal angle using a specialized video camera (gonioscope) and a slit lamp.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021