In this study, we employed finite element analysis to investigate the biomechanical responses of the optic nerve under varying G-forces and intraocular pressures (IOPs). Six eyeball models were constructed using SolidWorks, including a porcine eye and five human eyes with axial lengths of 22, 24, 26, 28, and 30 mm, corresponding to hyperopia, emmetropia, and varying degrees of myopia. These models were imported into ANSYS for modal and transient dynamic analyses. The modal analysis results indicate that increasing axial length leads to decreases in natural frequencies across all modes, while the mode shapes remain similar regardless of axial variation. In the dynamic G-force simulations, the eyeball was constrained to displace only along the primary loading axis, and G-force was increased incrementally from 1G to 6G. The analysis reveals that beyond 3G, differences in flight posture and IOP have a limited effect on the trends of stress and strain in the optic nerve. However, eyes with higher IOP exhibit greater internal pressure responses during loading than those with lower IOP. These findings suggest that axial elongation significantly alters the mechanical behavior of the eye, reducing structural stiffness, whereas elevated IOP amplifies internal stress distribution. The results provide insight into ocular safety in high-acceleration environments and contribute to understanding biomechanical risk factors for optic nerve damage in individuals with myopia or elevated IOP. The objective of this study is to establish a sensor-assisted biomechanical framework for analyzing ocular responses under varying IOPs and dynamic loading conditions. The present model assumes fixed IOP values and does not consider physiological aqueous humor regulation. Future work will integrate physiological mechanisms and advanced ocular sensing concepts to improve the prediction of ocular behavior under complex loading environments.