The barrier characteristics of the cornea are interrogated using impact micro-particles into ex vivo porcine cornea. Using a commercial gene gun (BioRad; PDS1000), microparticles were accelerated and made to embed in target materials: either ballistic gelatin as reference or corneal tissue. Statistical analysis penetration polydisperse spherical (5–22 μm dia.) with density 2.5 g/cc, 4.2 7.8 g/c...