·AIM:To present a case of Horner’s syndrome which developped after neck surgery.·METHODS:The patient was admitted to our clinic with the complaint of droop of right eye’s upper lid which appeared after having a neck surgery for cervical radiculopathy.Full ophthalmologic examination was done,including pharmachological tests to confirm the diagnosis.·RESULTS:The right upper eyelid was 1.5mm ptotic.Right pupil was miotic.There was a lag of dilation in the right pupil in the dark.Facial anhidrosis was present at the right side of the face.Right pupil dilated and upper eyelid ptosis improved with apraclonidine 5g/L application.·CONCLUSION:Sympathetic denervation of the eye(Horner’s syndrome(HS))usually presents as a triad of ptosis of upper eyelid,miosis and facial anhydrosis.We present a case of HS after anterior cervical discectomy operation which is an unusual and rare cause of persistant HS.·