With the use of ATAC-350 (Nihon Kohden) a study was made of the effects of wearing contact lenses on the unit discharges of the reticular formation induced by photic stimulation in rabbits.
1) By use of an interval histogram, it was demonstrated that wearing contact lenses led to a marked increase in the frequency of unit discharges in the midbrain reticular formation induced by photic stimulation.
2) In the pulse count histogram, an increase in the frequency of the unit discharges of 90msec latency induced by photic stimulation was observed by wearing contact lenses.
3) It was assumed that the increase of the unit discharges was due to an increase of activity of the reticular formation which was elicited by the pain following wearing contact lenses.