Incidence of spontaneous venous pulsation in the retina.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001794:Blood Pressure; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009887:Ophthalmoscopy; D011674:Pulse; D011680:Pupil; D012160:Retina / Q000098:blood supply*; D012171:Retinal Vessels / Q000502:physiology*