Blood vessels in the normal retina.
D000368:Aged; D000818:Animals; D002196:Capillaries / Q000166:cytology; D002463:Cell Membrane Permeability; D006801:Humans; D008833:Microcirculation; D008854:Microscopy, Electron; D012171:Retinal Vessels / Q000033:anatomy & histology* / Q000166:cytology