| Recruiting | Comparison of the Effects of Sevoflurane and Desflurane on Optic Nerve Sheath Diameter During Laparoscopic Sur NCT07525648 | Medipol University | N/A |
| Recruiting | Effect Of Trendelenburg Position And Pneumoperitoneum On Optic Nerve Sheath Diameter In Robot-Assisted Prostat NCT07491198 | Ege University | — |
| Completed | Intracranial Pressure and a Potential Vicious Circle of Atrial Fibrillation in HFpEF NCT07521293 | Ankara Ataturk Sanatorium Training and Research Hospital | — |
| Completed | Effect of Different Positive End-Expiratory Pressure (PEEP) Levels on Optic Nerve Sheath Diameter NCT07085949 | Izmir City Hospital | — |
| Completed | Evaluation of Optic Nerve Sheath Diameter Changes During Cardiopulmonary Bypass in Open Heart Surgery NCT07253922 | Medipol University | — |
| Not Yet Recruiting | Comparison of the Effects of Endotracheal Intubation and Laryngeal Mask Applications on Optic Nerve Diameter i NCT06994481 | Marmara University Pendik Training and Research Hospital | — |
| Recruiting | Early WAKE-up Predictors After Out-of-Hospital Cardiac Arrest NCT06979700 | University of Aarhus | — |
| Not Yet Recruiting | Oropharyngeal Vs Intravenous Lidocaine Effects on Optic Nerve Sheath Diameter After Intubation NCT06874179 | Ankara City Hospital Bilkent | N/A |
| Completed | Changes in Optic Nerve Sheath Diameter in Desflurane Based General Anesthesia During Laparoscopic Cholecystect NCT06896604 | Fatih Sultan Mehmet Training and Research Hospital | — |
| Completed | Plasma Rich Fibrin Epidural Injection by Racz Catheter in Postdural Puncture Headache Guided Optic Nerve Sheat NCT06790758 | Tanta University | N/A |
| Enrolling By Invitation | Effect of Carbon Dioxide Pressure on Optic Nerve Sheath Diameter in Laparoscopic Transperitoneal Nephrectomy NCT07262125 | Fatih Sultan Mehmet Training and Research Hospital | N/A |
| Completed | The Application of Ultrasonic Measurement of Optic Nerve Sheath Diameter in Liposuction Surgery NCT06685952 | The Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College | — |
| Not Yet Recruiting | Effect of Spinal Needle Type on Optic Nerve Sheath Diameter NCT06497634 | Bagcilar Training and Research Hospital | N/A |
| Recruiting | The Effects of Positive End-expiratory Pressure (PEEP) on Optic Nerve Sheath Diameter in Laparoscopic Cholecys NCT06979999 | Nigde Omer Halisdemir University | N/A |
| Recruiting | Lidocaine, Dexmedetomidine, Esmolol and Magnesium Effect on Optic Nerve Sheath Diameter After Laryngoscopy NCT06254534 | Haseki Training and Research Hospital | N/A |
| Completed | Effect of Desflurane v/s Propofol on the Optic Nerve Sheath Diameter NCT07359508 | All India Institute of Medical Sciences | Phase 4 |
| Completed | Intraoperative Optic Nerve Sheath Diameter Changes After Laparoscopic Surgery NCT06209034 | Kocaeli University | N/A |
| Completed | Effect of Caudal Block Injection Rate on Optic Nerve Sheath Diameter in Pediatric Surgeries NCT06187714 | Prof. Dr. Cemil Tascıoglu Education and Research Hospital Organization | — |
| Completed | Optic Nerve Sheath Diameter in Pre-Eclamptic Parturient Receiving Magnesium Sulfate Combined With Dexmedetomid NCT05610774 | Benha University | N/A |
| Completed | Lidocaine Infusion on Optic Nerve Sheath Diameter in Laparoscopic Hysterectomy in Trendelenburg Position NCT05690087 | Tanta University | N/A |
| Unknown | Non-invasive Assessment of Intracranial Pressure Using Ocular Sonography in Patients Undergoing Laparoscopic S NCT05485363 | Tanta University | N/A |
| Completed | Ultrasound Measurement of Optic Nerve Sheath Diameter as Non-Invasive Detector of Raised Intracranial Pressure NCT06993961 | Ain Shams University | — |
| Completed | Optic Nerve Sheath Diameter: A Non-Invasive Indicator of Intracranial Pressure in the Intensive Care Unit Moni NCT06367868 | Istanbul University - Cerrahpasa | N/A |
| Completed | Effect of Sevoflurane and Propofol on the Optic Nerve Sheath Diameter NCT04955925 | SMG-SNU Boramae Medical Center | — |
| Unknown | The Effect of Anesthesia Management on Optic Nerve Sheath Diameter in the Ercp Procedures NCT04910087 | Ankara City Hospital Bilkent | N/A |
| Completed | Effect of Contrast Medium on Optic Nerve Sheath Diameter NCT04826042 | Keimyung University Dongsan Medical Center | N/A |
| Unknown | Comparison of Changes of ONSD Between Groups of Laparoscopic Surgery With and Without Epidural Saline Injectio NCT04758013 | Keimyung University Dongsan Medical Center | N/A |
| Completed | Changes of Optic Nerve Sheath Diameter Between Obese and Non-obese Patients Undergoing Laparoscopic Gynecologi NCT04427085 | SMG-SNU Boramae Medical Center | N/A |
| Unknown | Effect of Cervical Immobilization on Optic Nerve Sheath Diameter NCT04507620 | Tanta University | — |
| Completed | Optic Nerve Sheath Diameter Difference Between Different Injection Volume NCT04412109 | Keimyung University Dongsan Medical Center | N/A |
| Completed | Effect of Pressure Regulation on Optic Nerve Sheath Diameter NCT04339244 | Keimyung University Dongsan Medical Center | N/A |
| Unknown | Changes in Optic Nerve Sheath Diameter in Patients Undergoing Spinal Surgery in the Prone Position NCT04301817 | SMG-SNU Boramae Medical Center | — |
| Unknown | Optic Nerve Sheath Diameter in Prediction of Fluid Responsiveness NCT04092036 | Tanta University | — |
| Completed | Effect of Different Supralottic Airway Devicess on Optic Nerve Sheath Diameter NCT05499754 | Zonguldak Bulent Ecevit University | — |
| Completed | Anesthesia on Optic Nerve Sheath Diameter NCT04407715 | Bursa Yuksek Ihtisas Training and Research Hospital | N/A |
| Unknown | Association of the Optic Nerve Sheath Diameter With Eyeball Transverse Diameter in Robot-assisted Prostatectom NCT03691025 | Hacettepe University | — |
| Completed | Effect of Cervical Collar on Intracranial Pressure NCT03609879 | Lazarski University | N/A |
| Completed | Different Resectoscopes Effects to Optic Nerve Sheath Diameter NCT04765397 | Bursa Yuksek Ihtisas Training and Research Hospital | N/A |
| Completed | Measurement of Optic Nerve Sheath Diameter NCT03362255 | Keimyung University Dongsan Medical Center | N/A |
| Completed | Optic Nerve Sheath Diameter in Craniosynostosis NCT03131245 | Seoul National University Hospital | — |
| Completed | Analysis of Change of Optic Nerve Sheath Diameter in Robot Assisted Laparoscopic Radical Prostatectomy NCT03152981 | Seoul National University Hospital | N/A |
| Completed | Optic Nerve Sheath Diameter in Retrobulbar Ultrasound as a Surrogate Measure for Intracranial Pressure Before NCT03634176 | Hospital Dr. Miguel Pérez Carreño | — |
| Completed | The Effects of Lateral 45° Downward Position on the Optic Nerve Sheath Diameter NCT05185908 | Istanbul University | — |
| Unknown | Intraocular Pressure Versus Optic Nerve Sheath Diameter NCT02697825 | Rajiv Gandhi Cancer Institute & Research Center, India | N/A |