What can I expect during an eye examination for glaucoma?

An ophthalmologist (a medical doctor who specializes in eye care and surgery) initially checks your central vision using an eye chart. The front of your eyes are examined using a special microscope called a slit lamp.
 
The pressure inside your eyes is checked using an instrument called a tonometer. Your optic nerves are examined for any damage; this may require dilation of the pupils to ensure an adequate examination of the optic nerves.
 
Your peripheral vision may be checked, typically by using an automated visual field machine. The drainage channels in your eyes may be examined using a technique called gonioscopy, which involves the use of a special contact lens.