The human eye sees 38% of the light spectrum.
WHAT ARE WE NOT PERCEIVING?
Let me put it another way. The agents of creation, the energy that actually animates the matter and the life that we think we see around us, cannot be measured or weighed or even put into time, as we know it. In one form, that energy is photons of light. The smallest object is a universe of open space to them, and the entire universe is but a speck of dust. What we call the world is just an idea – and not a very good one, yet. From the point of view of the light, the photon of light that animates it, the universe that we know is not real. Nothing is. Do you understand now? 
…To know the truth all you have to do is close your eyes. We can know God, and we can know sadness. We can know dreams, and we can know love. None are real, in our usual sense of things that exist in the world & seem real. We cannot weigh or measure them.