One of the most iconic moments in Ridley Scott’s Blade Runner (1982) is the Voight-Kampff test. Designed to detect replicants, it doesn’t just ask questions. It carefully measures micro-reactions in the eyes and face. On screen, you see the subject’s pupil contracting, iris movements, and subtle facial twitches. These tiny reflexes reveal emotional responses that a replicant supposedly cannot produce like a human. Fun fact: the test is entirely fictional, but it inspired many biometric and eye-t