@article{2944409, title = "Michael Constantine Psellus (1020–1105 AD) and his definition of strabismus", author = "Gregory Tsoucalas and Theodoros Papaioannou and Marianna Karamanou", journal = "Strabismus", year = "2018", volume = "26", number = "3", pages = "155--157", publisher = "Informa UK Limited", issn = "0927-3972, 1744-5132", doi = "10.1080/09273972.2018.1467470" }