Abstract
Electrophysiological studies were conducted in rabbits in order to examine the effect of contact lenses on the sympathetic nerve activity and the following observations were made.
1) The amplitude of the spontaneous spike discharges of the cervical sympathetic trunk increased with the wearing of contact lenses.
2) By use of an interval histogra m of ATAC-350 (Nihon Kohden) it was revealed that wearing of contact lenses led to a marked increase in the frequency of spike discharges of the cervical sympathetic trunk.
3) It was assumed that the facilitation of sympathetic nerve activity was due to activation of the somato-sympathetic reflex induced by pain stimulation following wearing of contact lenses.
