youtube > Stan Grof — Lessons from ~4,500 LSD Sessions and Beyond
Stan Grof was EEG monitored with strobe light and under LSD back in 1956

https://www.epilepsy.com/connect/forums/diagnostic-dilemmas-and-testing/closed-eye-eeg-strobe-test-what-normal-reaction

https://en.wikipedia.org/wiki/Electroencephalography

Webgazer.js webcam eye tracking on the browser - https://news.ycombinator.com/item?id=23859985