Lid lag

Short description: Medical sign involving the human eyelid

Lid lag is the static situation in which the upper eyelid is higher than normal with the globe in downgaze.[1] It is most often a sign of thyroid 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 process. It can also be the manifestation of chemosis (swelling (or edema) of the conjunctiva).

## References

1. ↑ Harvey, JT; Anderson, RL (1981). "Lid lag and lagophthalmos: a clarification of terminology". Ophthalmic Surg 12 (5): 338–40. PMID 7266976.

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