Chance reading of a paper by Lebensohn,1 written two years ago, suggests publication of some observations I made a number of years ago and never reported. Lebensohn wrote :
From these experiments, one can definitely conclude that car-sickness is due to labyrinthine stimulation rather than to optic nystagmus. Optic nystagmus is easily tolerated and is not accompanied by depressive gastric phenomena. The impulses from the labyrinth, however, are depressive. . . . Though car-sickness is based on labyrinthine irritation, it is nevertheless true, I believe, that errors of refraction and of muscle balance predispose a person to this malady.
The observations I here report indicate that Lebensohn's statements are not adequate. The matter is more complex than he indicated.
My observations were made on myself, a good subject because I am unusually prone to seasickness.
I have made numerous experiments, probably twenty or more, off and on for forty years. The subject of
Metcalf MM. EYE AND EAR IN "SEASICKNESS". Arch Ophthalmol. 1932;8(2):269–270. doi:10.1001/archopht.1932.00820150121014