 And so your brain will automatically correct itself to what normal brain waves are supposed to be in order to be able to see better. It's wild. And the research is quite clear on this. So there's nothing invasive. There's nothing we're not putting probes in your brain or anything like that. Like I said, an EEG, an electroencephalogram to test is, again, it's taking readings from your brain. It's not actually doing anything to your brain. And the treatments itself...