Prospective interventional study evaluates how gaze deviation affects optic nerve sheath diameter in healthy volunteers, implying need for standardization.
Key Points
This study investigates how gaze deviation impacts optic nerve sheath diameter (ONSD) measurements and the role of bed inclination.
Prospective interventional study involving 44 healthy volunteers.
ONSD measured at 45° bed incline in both neutral and deviated gaze.
Nonparametric analyses were conducted on the results.
Gaze deviation significantly reduced ONSD values by 0.8-1.0 mm (p < 0.001, large effect sizes).
No significant differences in ONSD measurements at 45° and 0° bed incline (p > 0.5).