Blade Runner has many interesting elements that touch on the ideas of humanity, replication, and the future. We follow Deckard throughout the film as he is on the quest to kill replicants that have illegally escaped to earth in hopes of prolonging their lives. Throughout the film, eyesight seems to be central to identification. In the beginning of the film we see the questioning a replicant, accompanied by a monitor that analyzes eyes to determine whether or not the individual was a replicant. Eyes come into play later in the film as well, when Roy finds Sebastian, the man who created his eyes. Our eyes are essential—we gather information through our eyes, and we form visual memories with our eyes, but our eyes also reveal a lot about us. Our eyes are one of the most intricate parts of our bodies and have the capacity to reveal a lot about our emotions. I thought it was interesting that eyes were the only way to determine whether someone was human or a replicant. It seemed to be the only factor differentiating the replicants from human beings. Yet, with more advanced replicants like Rachel, it is still difficult to determine.