Horner’s syndrome Directory References Discover 10 Failed Doomsday Predictions What Is the Most Widely Practiced Religion in the World? Timeline of the American Civil Rights Movement 7 Unique Burial Rituals Across the World 7 Deadliest Weapons in History Nostradamus and His Prophecies How Deadly Is Quicksand? Contents Horner’s syndrome medical disorder Ask the Chatbot a Question Ask the Chatbot a Question Learn about this topic in these articles:occurrence of ptosis In ptosisIn a disorder called Horner syndrome, a slight ptosis occurs in association with a smaller pupil and decreased sweat production on the affected side. Read More