A 82 years old female patient admitted to our clinic with ptosis of the right eye, restriction of eye movements and double vision. In physical examination, with ptosis in the right eye, there were also movement restrictions to upward, downward and inward directions. Two months before when first symptoms appeared, in the medical centre that our patient admitted, there was also anisocoria (right>left) that was not present in our physical examination. With possible diagnosis of third cranial nerve palsy, cranial MRI and MRI angiography procedures were performed for our patient taking antihypertensive medications. Lesions suitable for subacute infarction of left posterior cerebral artery watershed were seen in left medial occipital lobe and para hippocampal gyrus cortex. Right internal carotid artery was totally ocluded and left vertebral and posterior comminican artery were hypoplasic. After one month, all lesions were subsided spontaneously.