One of the richest sources of vitamin A in the entire animal body is that of the tissues back of the eyes including the retina of the eye (chewfo.com)
«We set out to show that we could image both the front and back of the eye without changing instruments. (sciencedaily.com)
Abnormal, increased electrical impulses in the brain which may cause jerking movements, rolling back of the eyes, sucking motions and stiffening of the arms and legs. (womenandinfants.org)