Fig. 25. Ocular myasthenia with motility pattern mimicking bilateral internuclear ophthalmoplegia. Lag of adducting eye on right (A) and left (C) gaze, relieved with edrophonium (Tensilon) (B and D). Convergence before (E) and after (F) edrophonium administration. Note relief of ptosis (B and D). (Glaser JS: Myasthenic pseudointernuclear ophthalmoplegia. Arch Ophthalmol 75:363, 1966. Copyright © 1966, American Medical Association)