Carotid ophthalmic aneurysm 2mm can be treated conservatively and surgically. 1. Conservative treatment: 2mm cerebral aneurysm belongs to tiny aneurysm, and the possibility of rupture and bleeding is relatively small. For unruptured and asymptomatic cerebral aneurysm, observation can be carried out first, and the cranial CTA examination can be repeated regularly to observe the change of the size of the cerebral aneurysm. 2. Surgery: For cerebral aneurysms that have already ruptured and bled, or cerebral aneurysms with clinical symptoms, timely treatment is needed because the risk of rupture and bleeding of cerebral aneurysms is relatively large at this time, and there is a risk of rupture and bleeding at any time if no treatment is carried out. It is recommended that patients with cerebral aneurysm should go to the hospital in time, and choose the appropriate treatment plan under the guidance of the doctor, so as to avoid delaying the condition and causing serious consequences.