Experiments with, rabbits were made of M wave and H wave in reference to the effects of wearing contact lenses.
1) On the p eak time of M wave and H wave in the m. gastrocnemius induced by the tibial nerve stimulation, wearing contact lenses showed almost no effects.
2) The amplitude of M wave was not changed significantly, w hile that of H wave was increased by wearing contact lenses.
3) It was assumed that the increase in amplitude of H wave was due to facilitation of the monosynaptic reflex following inhibition of the reticular formation.
