what is gonioscopy
Guide. Gonioscopy is an eye examination to look at the front part of your eye (anterior chamber) between the cornea and the iris. Gonioscopy is a painless examination to see whether the area where fluid drains out of your eye (called the drainage angle) is open or closed.It is often done during a regular eye examination, depending on your age and whether you are at high risk for glaucoma.onioscopy is done to: 1  Look at the front of the eye to check for glaucoma. 2  See if the drainage angle of the eye is closed or nearly closed. 3  This helps your doctor see which type of glaucoma you have. 4  Gonioscopy can also find scarring or other damage to the drainage angle. 5  Treat glaucoma.