Musculi externi eyes are rarely (39: 100) paralyzed in the prodromal period of the tabes. Paralysis is mild and transient at first, but returns severe and prolonged. In this case, all, or almost all, of the motor of the eye is affected, which deviates outward, and ptosis sets in. Temporary paralysis, according to some, are considered to be a consequence of peripheral neuritis, and long-term paralysis is a consequence of damage to the centers of the medulla oblongata. Adamkievitz considered the cause of transient diplopia to be a short-term rush of blood to the nerve trunks and nuclei, and Gweicher - sclerosis of the arteries and ischemia of the motor centers. Dejerine, in a case of isolated paralysis, of a tabetik's eyelid lifter, after opening, found a deep degeneration of his nerve filament, while the trunk of nervi oculomotorii turned out to be unchanged. Because of this, he considers the disease to be peripheral nervo-tabes.