Horner’s syndrome Directory References Discover 12 Novels Considered the “Greatest Book Ever Written” Why Is Ireland Two Countries? 6 Wars of Independence The Seven Sacraments of the Roman Catholic church Will Light-Speed Space Travel Ever Be Possible? 9 Mind-Altering Plants Timeline of the Titanic’s Final Hours 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