Neurofeedback is a technique that helps people learn how to control their brain function. This process involves monitoring brainwaves, which are electrical impulses in the brain. Brainwaves can be measured using a tool called an EEG. The EEG records the different types of brainwaves, such as α, beta, theta, and https://s3.us-west-1.amazonaws.com/neurofeedback-therapy-equipment/pupil-dilation-trackers.html