The term X-RAY VISION BLOCKER can be summarized as a job that requires the use of LEAD to block x-ray vision. LEAD is a heavy metal that is used in many industries, including medical imaging and radiation protection. It is also used in construction and manufacturing to protect against radiation exposure. LEAD is an effective x-ray vision blocker because it absorbs x-rays and prevents them from passing through. LEAD is also used in other applications such as shielding electrical components and providing soundproofing.