Enumeration of small vessels on the optic disks in normal eyes.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002196:Capillaries / Q000033:anatomy & histology*; D003116:Color; D005260:Female; D005654:Fundus Oculi; D006801:Humans; D008297:Male; D008875:Middle Aged; D009887:Ophthalmoscopy; D009896:Optic Atrophy / Q000473:pathology; D009900:Optic Nerve / Q000098:blood supply*; D010781:Photography; D012171:Retinal Vessels / Q000033:anatomy & histology*