Established, decades-old science
A VEP test measures electrical activity traveling from the eye to the visual cortex. Doctors use it to check for damage along the optic nerve. Separately, MIT research has shown the brain can process and identify an entire image in as little as 13 milliseconds, evidence of how fast and specific this signal pathway really is.
- Odom et al., "ISCEV standard for clinical visual evoked potentials: (2016 update)," Documenta Ophthalmologica, 2016. doi.org/10.1007/s10633-016-9553-y
- Potter et al., "Detecting meaning in RSVP at 13 ms per picture," Attention, Perception, & Psychophysics, 2014. doi.org/10.3758/s13414-013-0605-z