HIF1A and retinitis: To evaluate the expression of GFAP, ionized calcium binding adaptor molecule-1(Iba1), hypoxia inducing factor (HIF)-1α, and the extent of histone acetylation after retinal IR injury, retinas were removed from the eyes at 1, 3, and 7 days after IR injury (n = 6 retinas per time point, Figure 1).