Computerized visual field testing and glaucoma

Computerized visual field testing (perimetry) measures the function of the visual system: it evaluates how well a patient detects objects at each point of their peripheral and central vision.

While OCT evaluates the structure of the optic nerve, the visual field evaluates its function. Both tests complement each other and, used together, confirm the glaucoma diagnosis and precisely classify how advanced the damage is.

During the test, the patient sits in front of a device and presses a button each time they perceive a point of light in different areas of their vision, while keeping their gaze fixed on a central point. The result is a map showing the areas where visual sensitivity is reduced.

This test is usually repeated periodically — generally once or twice a year, depending on the case — to monitor disease progression.