X-Ray vision

X-Ray vision is a term used to describe the ability to look through something. Superman and other Kryptonians under a yellow sun possess this ability to see through solid objects, and despite the fact that its' referred to as "X-Ray" vision, whenever Superman uses this power he can actually see every color, unlike traditional X-Rays, which only show up in black and white.

Lead however, can block X-Ray vision.