Cogan's lid twitch and eyelid hopping
In a series of 117 patients, the specificity of the lid twitch sign was 99%, the sensitivity was 75% and the false-positive rate was 1%.(4)
1. Campbell WW. Clinical signs in neurology : a compendium. Philadelphia: Wolters Kluwer Health, 2016.
2. Campbell WW. DeJong's the neurologic examination, 7th ed. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins, 2013.
3. Cogan DG. Myasthenia gravis: a review of the disease and a description of lid twitch as a characteristic sign. Arch Ophthalmol. 1965 Aug;74:217-21.
4. Singman EL, Matta NS, Silbert DI. Use of the Cogan lid twitch to identify myasthenia gravis. J Neuroophthalmol. 2011 Sep;31(3):239-40.