• Courtesy of Rod Foroozan, MD.
    File Size: 112 KB
    Related: Ptosis, Hering's law

    A, Patient with myasthenia gravis and left-sided ptosis that is greater than that on the right. B, Manual opening of the left eyelid results in greater rightsided ptosis (enhanced ptosis). This sign, although often present with myasthenia gravis, is not specific. It may occur with other disorders producing asymmetric ptosis and is a manifestation of Hering’s law of equal innervation.