Tunahan Sun, M.D., is a psychiatrist at Osmaniye Düziçi State Hospital in Turkey, where he has served since September 30, 2022. He completed his psychiatry residency at Çukurova University Faculty of Medicine (2018–2022). Dr. Sun’s research focuses on obsessive–compulsive and related disorders, impulsivity across psychiatric conditions, neuro-ophthalmic correlates, and clinical psychopharmacology. He serves as a reviewer for addiction and psychiatry journals. Dr. Sun is a member of the Turkish Psychiatric Association and a board member of the Çukurova Mental Health Association (2025). In 2025, he passed the European Board Examination in Psychiatry and was awarded Fellowship of the European Board of Psychiatry; his clinical training includes CBT and EMDR.