Gonioscopy - a mirrored device to measure the edge of where the cornea reaches the iris. How open or closed the side is can be an indication of how severe glaucoma might be.

Visual Field - Also known as perimetry, beginning at a light center vision. At the same time, other views are shined into his or her peripheral vision. This test measures peripheral vision and can be used to detect the onset of open-angle glaucoma.

Nerve Fiber Analysis - relatively a new test that measures the thickness of the nerve fiber.
Pachymetry - Measure the thickness of the cornea, to know the amount of pressure in the eye.
Dilation - examines the back of the eye, where blood vessels are found, with the retina and optic nerve.
Cover test - Eyes are alternately coated focusing on a further object.