Simulations of Porcine Eye Exposure to Primary Blast Insult

Abstract

Purpose: A computational model of the porcine eye was developed to simulate primary blast exposure. This model will facilitate understanding of blast-induced injury mechanisms.

Methods: A computational model of the porcine eye was used to simulate the effects of primary blast loading for comparison with experimental findings from shock tube experiments. The eye model was exposed to overpressure-time histories measured during physical experiments. Deformations and mechanical stresses within various ocular tissues were then examined for correlation with pathological findings in the experiments.

Results: Stresses and strains experienced in the eye during a primary blast event increase as the severity of the blast exposure increases. Locations of peak stresses in the model were highly co-localized with regions in which damage was routinely observed in the physical experiments.

Conclusions: Blast injuries to the anterior chamber may be due to inertial displacement of the lens and ciliary body while posterior damage may arise due to contrecoup interactions of the vitreous and retina. Correlation of modeling predictions with physical experiments lends confidence that the model accurately represents the conditions found in the physical experiments.