The retina and optic nerve.
D000818:Animals; D003452:Cryosurgery; D003930:Diabetic Retinopathy / Q000503:physiopathology / Q000601:surgery; D005132:Eye Manifestations; D005471:Fluoroscopy; D005654:Fundus Oculi; D006801:Humans; D007239:Infections / Q000628:therapy; D007249:Inflammation; D009900:Optic Nerve; D010781:Photography; D010902:Pituitary Gland / Q000601:surgery; D012160:Retina / Q000032:analysis / Q000033:anatomy & histology / Q000502:physiology; D012162:Retinal Degeneration; D012163:Retinal Detachment / Q000473:pathology / Q000628:therapy; D012171:Retinal Vessels / Q000503:physiopathology; D014652:Vascular Diseases