Gonioscopy
Once the surface of the eye has been numbed, it becomes possible to perform gonioscopy (Figure 6a). By gently placing a special contact lens on the eye, your doctor can examine the drain within the eye to help determine the type of glaucoma.
Using the slitlamp for magnification, your doctor can determine whether the drain is open or closed, check its colour, and see if scar tissue is present (Figure 6b). You might feel slight pressure on the eye as your doctor moves the lens, but this should not be uncomfortable. Gonioscopy is usually done annually, although there may be more frequent examinations with certain forms of glaucoma or use of certain medications.
