Fig. 12. Pathologic lid retraction (Collier's sign) in rostral mesencephalic disorders. A. A patient with pinealoma. Note the position of the lids in forward gaze. The pupils are mid-dilated and light fixed. B. On downward gaze, the lids follow the eyes smoothly without retraction. C. A “setting sun” sign with lid retraction associated with infantile hydrocephalus.