Henrik Samuel Conrad Sjögren (UK: /ˈʃɜːɡrɛn/, US: /ˈʃoʊɡrɛn/, Swedish: [ˈɧø̂ːɡreːn]; 23 July 1899, Köping – 17 September 1986, Lund) was a Swedish ophthalmologist best known for describing the eponymous condition Sjögren syndrome. Sjögren received his medical degree in Stockholm 1927 and in 1933 published a doctoral thesis at the Karolinska Institute titled "On knowledge of keratoconjunctivitis" that eventually served as the basis of identifying and naming of Sjögren's syndrome. He had one child born in 1934 named Gunvor.