Stellwag's sign

Stellwag's sign is a sign of infrequent or incomplete blinking associated with exophthalmos or Graves orbitopathy. It is accompanied by Dalrymple's sign, which is a retraction of the upper eyelids resulting in an apparent widening of the palpebral opening.

Stellwag's sign is named after Austrian ophthalmologist Carl von Carion Stellwag (1823-1904).

Reference

 * Definition at Dorlands Medical Dictionary
 * Essay on Graves' Disease