The 52-year-old Ms. Hu’s left eyelid has been pressing down recently, and her vision is blurred. Friends around her said that it might be caused by old age and loose skin. However, when she went to the hospital for a medical checkup last month, Ms. Hu unexpectedly found a large aneurysm at the base of her skull, with a diameter of 1.5 cm. Wang Hao, deputy chief of neurosurgery at Hangzhou First Hospital, said that the aneurysm’s compression of the optic nerve caused Ms. Hu’s eyelids to droop and her vision to drop significantly. ”Ms. Hu’s surgical treatment was more difficult, one because her aneurysm was a large aneurysm; secondly, the location was special, located in a deeper position at the base of the skull, and the space was narrow, and the surrounding blood vessels and nerve relationships were very complex.” Dr. Wang Hao said that after careful evaluation, the treatment team finally decided to cranially clamp the aneurysm, and the operation went very smoothly, and the patient recovered better. Not only the risk of aneurysm rupture was eliminated, vision and visual field function were also basically restored. Dr. Wang Hao introduced that ophthalmic aneurysms are not common in clinical practice and generally account for only 5% of aneurysms. The main clinical symptoms are vision loss, visual field loss and ptosis, and then endocrine disorders are caused by compression of the pituitary gland and hypothalamus, which can be life-threatening if ruptured. For this reason, aneurysms are called “untimely bombs” and their onset is often very sudden. However, although aneurysms usually have no obvious symptoms before they rupture, they can be detected early through some clues. For example, many patients may have recurrent mild headache attacks, as well as symptoms of nerve palsy on the affected side, such as inability to raise the eyelids, loss of vision, incomplete visualization, and slight protrusion of the eyeballs. Once these symptoms are detected, early diagnosis and treatment can be achieved through head MRI, cerebral angiography and other examinations to clarify the cause of bleeding and the status of the aneurysm.