Transorbital Sonography in the Evaluation of the Optic Nerve and Optic Nerve Sheath Diameter Considering Specific Demographic Features

Transorbital sonography is a reliable method for non-invasive assessment of optic nerve diameter (OND) and sheath (ONSD) in patients with increased intracranial pressure. A wide range regular ONSD values has been reported the literature. The aim this study was to determine normal OND ONSD, differences between considering sex, age, body mass index (BMI), evaluate inter - intra examiner variability. included 100 healthy subjects, aged 22 87 years, who underwent transbulbar by two examiners, each measuring twice on both eyes at depth 3 mm behind papilla. Measurement analysis possible all subjects. Mean 2.39 +/- 0.28 mean 4.48 0.76 mm. In males, 2.47 females 2.35 0.27 (p = 0.042). There no statistically significant difference sexes > 0.001). Correlation age wasn`t observed. Positive correlation BMI 0.001) within investigator measurements < 0.01) shown. Men have wider compared women, but Age doesn`t effect width ONSD. correlates positively OND, not