SD-OCT analysis of total retinal (A-B) and external limiting membrane (ELM; C-D) thickness at 2, 4, and 6 months post-blast for rats in open (A, C) and enclosed holders (B, D) taken 0.5 mm from the optic nerve. The ipsilateral and contralateral blast-exposed eyes were significantly thinner, with respect to both total retinal (4%) and external limiting membrane (ELM) (18%) thickness, compared to non-blast-exposed control eyes. * p < 0.05, mean ± SEM.