Figure 1. Number of apoptotic retinal ganglion cells in flatmounted healthy retinas 24 h after intravitreal administration of rtPA (2.16, 0.54, and 0.27 µg in 5 µl) or vehicle (NaCl 0.9%, 5 µl). There was a statistically significantly higher number of apoptotic cells in the eyes that received 2.16 µg/5 µl compared to vehicle. * p<0.05.