In 1846, William Morton publicly demonstrated the use of ether as an anesthetic during surgery, marking a revolutionary advancement in medical practice. This demonstration alleviated pain for patients undergoing surgical procedures, fundamentally changing the approach to surgery and patient care. Morton's work paved the way for the development of modern anesthesia, significantly improving surgical outcomes and patient comfort.

The discovery of anesthesia in 1846 revolutionized medical practices and influenced literary explorations of the subconscious and dream states. This development prefigured Symbolist and Surrealist interests in altered perception, transforming the poetic depiction of suffering, consciousness, and the human body.