Microglia, but not Müller glia, become reactive in response to blast in focal regions of the retina. (A–D) Epifluorescence micrographs of GFAP immunolabeling (green) in control (A) and in 3- (B), 7- (C), and 28- (D) day postblast retinas. (E–H) Iba-1 immunolabeling (green) of microglia in control (E), 3- (F), 7- (G), and 28- (H) day postblast retinas. Insets show higher magnification of representative microglia. DAPI-labeled nuclei (blue).