Area of the retina occupied by Iba-1+ cells in the NFL-GCL. Each bar represents the mean ± SD of area of the retina occupied by Iba-1+ cells. ***P <0.001 versus naïve and contralateral retinas. **P <0.01 versus naïve retinas. (NFL-GCL: nerve fiber layer-ganglion cell layer; OHT: ocular hypertension; RA: retinal area) (y axis: Iba1-RA (μm2)).