Gonioscopy is an eye examination to look at your front part of the eye which is the area between cornea and the iris. It’s a painless examination to see whether the area where fluid drains out of your eye is open or closed. It is generally done during the regular eye examination by the eye specialist, depending on your age and whether you are at risk of glaucoma.

When your doctor suspects glaucoma which is an eye disease that causes blindness by the damage of the optic nerve. It also helps the doctor to know which the kind of glaucoma you have.

Why the test is conducted

  • To look at the front of the eye to check for glaucoma
  • To see that the drainage angle of the eye is closed or nearly closed. The test can also find scarring or other damage to the drainage angle.
  • During the test, laser light is passed through the lens at the drainage angle. This laser treatment to the eye can lessen the pressure in the eye which helps to control glaucoma.
  • Check for other birth defects that may cause glaucoma.

How is the test conducted?

The test is conducted by the eye specialist who treats an eye problem. Eye drop is used to numb the eye so that you do not feel the lens touching your eye during the painless examination. A microscope is generally used to look inside your eyes. A special lens is placed in front of your eye and a narrow beam of light is pointed into your eye. The doctor with the help of slit lamp looks for the width of the drainage angle. The examination takes less than 5 minutes.