The optics of the ophthalmoscope and related instruments.
D005123:Eye / Q000033:anatomy & histology; D005451:Fluorescein Angiography; D005654:Fundus Oculi; D006801:Humans; D008028:Light Coagulation; D019721:Ophthalmoscopes; D055095:Optics and Photonics; D010781:Photography