Lid lag is the static situation in which the eyelid is higher than normal with the globe in downgaze. It is most often a sign of throid eye disease, but may also occur with cicatricial changes to the eyelid or congenital ptosis. Lid lag differs from Von Graefe's sign in that the latter is a dynamic processs.
- Harvey, JT; Anderson, RL (1981). "Lid lag and lagophthalmos: a clarification of terminology". Ophthalmic Surg 12 (5): 338–40.