Classicly

Vickers had been examined many times. "The peculiarity of your vision," one eminent psycho-biologist had told him, "lies in your ability to see matter as it actually is. Tenuous unmaterial energy. There's more space between the nucleus of an atom and its electrons in proportion than between the sun and its planets. It's like looking at the stars"—and he had waved his hand at the sky—"you can see them but they don't obstruct your vision."