Sympathetic pupillary tone in old age
A. D. Korczyn, N. Laor and P. Nemet
In an attempt to determine whether autonomic neural factors might be
involved in senile miosis, we tested pupillary responses to agents acting
on the ocular sympathetic system in old subjects and compared them to
responses in young adults. Our results suggest that sympathetic tone is
decreased in the elderly. The dilator pupillae muscle does not lose its
sensitivity to norepinephrine with age.