X-Ray Vision, also known as Penetration Vision is the ability to perceive X-Rays as visible light, allowing one to see through most objects. This ability allows one to see through less dense materials, (even to see through the armor, clothes and muscles to only see subjects’ bone structure). However, this cannot be used if more than one dense material is placed in front of another, or if the material is too dense, which will appear opaque to the eyes. This ability may or may not be able to be turned off at will, and could be accompanied by another aspect of vision.