The retina and optic nerve.
D000818:Animals; D003930:Diabetic Retinopathy; D005128:Eye Diseases; D005134:Eye Neoplasms; D005452:Fluoresceins; D005654:Fundus Oculi; D006801:Humans; D008028:Light Coagulation; D009900:Optic Nerve / Q000033:anatomy & histology; D010523:Peripheral Nervous System Diseases; D010781:Photography; D012160:Retina / Q000033:anatomy & histology; D012162:Retinal Degeneration; D012163:Retinal Detachment; D012171:Retinal Vessels; D014652:Vascular Diseases
D005452:Fluoresceins