1. EDS screen shot: the low frequencies are seen on the left in the graph, and the high frequencies are on the right. The low frequencies, when prominent and elevated, indicate disruptive functioning.

The high frequencies are responsible for productive attention, concentration, and memory. Trends during the session are visible as the graph fills from the rear and moves toward the front.

2. The white cotton ball on the side of the person's head covers one of the electrodes attached to the person's scalp. The other electrode is attached to her left ear lobe. The scalp electrical activity is brought to a computer, analyzed, and fed back to her though the lights in the glasses.

3. The client with the glasses on during a session. Her eyes are closed. She does not have to pay attention to the light. She can daydream, plan, or be distracted. She does not have to learn anything or even pay attention. 

What she does have to do is to let the therapist know if she is uncomfortable, which leads to an adjustment of the light brightness.

The lights, even with the eyes closed, have a colorful, kaleidoscopic quality and are enjoyable to watch. The colors and patterns are everchanging as the person's brain waves (which control the lights) change.

4. Once the session is over it is reviewed for signs that the brain functioning has been changed during the session. The progress during the session is compared with trends across other sessions to document and provide a context for understanding the overall change in functioning. The sturdiness of the changes can also be assessed, along with an estimate of how many more sessions may be needed to accomplish the desired functioning goals.