Charly is a 1968 movie based on the SciFi short-story and later novel “Flowers for Algernon” by Daniel Keyes and it’s about Charly Gordon, an intellectually disabled adult who is selected by two doctors to undergo a surgical procedure that triples his IQ as it had done for a laboratory mouse who underwent the same procedure.
Anyone who has common sense will remember that the bewilderments of the eye are of two kinds, and arise from two causes, either from coming out of the light or from going into the light, which is true of the mind’s eye, quite as much as of the bodily eye. Plato - The Republic