In vivo blue-light confocal scanning laser ophthalmoscope images in the same retinal area of a transgenic Thy1-cyan fluorescent protein mouse (A) before and (B) 2 weeks and (C) 4 weeks after elevation of intraocular pressure to 115 mm Hg for 90 min. There were 66%, 63%, 67%, 67% of retinal ganglion cells remaining at 1, 2, 3 and 4 weeks after the ischaemic injury, respectively.