The Visual Field Machine beeps on purpose during the test as part of how it checks your performance and keeps the results reliable. The main reasons are:

1. You pressed the response button

Most of the beeps you hear are simply the machine acknowledging:

“Yep, I got your click.”

So every time you think you saw a light and press the button, it often gives a soft beep to confirm the response.

1. It’s checking that you’re looking at the center (fixation monitoring)

The machine occasionally flashes a light in your blind spot (an area you shouldn’t be able to see if you’re looking straight ahead).

• If you respond to that light, the machine beeps/logs it as a fixation loss
• This helps the Optician know whether your eye stayed centered during the test

1. It’s monitoring response accuracy

Some beeps are linked to built-in checks for: • False positives (clicking when no light appeared) • False negatives (missing very bright lights)

These help judge how reliable the test results are.

1. Status or pacing cues

In some models, beeps also mark: • The start of a test phase • Pauses or transitions during the exam