Heinlein, in several of his works, made reference to Samuel Renshaw, a WWII-era psychologist famous for teaching a form of speed-reading, or more aptly, speed-comprehension, that involved flashing images or text on a screen for brief intervals to force the student to perceive them faster.
If you’re interested in such things, and I am, you might be interested in an article I found on the subject. Click below to read it.