Caption: A schematic diagram of psychophysical sensitivity of the average human eye (i.e., luminosity function).
Features:
Luminous flux is the quantity of psychophysical sensitivity of the human eye with units lumens.
Scotopic vision is rather insensitive to color---it's nearly black-and-white vision.
The extreme human visible range ≅ 310--1050 nm. To see beyond the fiducial range 0.4--0.7 μm requires bright sources, ideal conditions, and for the ultraviolet part to have young eyes.
There is no revelation though---ultraviolet probably just looks violet and infrared just looks deep red (PP-19).
It may not be safe to look for very long at intense sources beyond the he fiducial range 0.4--0.7 μm of the visible light band---but I don't know.