Under normal circumstances, if you sneeze, there are several factors: First, during an acute cerebrovascular ischemic attack, sneezing too hard will stimulate the cerebral blood vessels and cause transient stenosis and contracture of the cerebral blood vessels, thus leading to insufficient blood supply to the cerebral blood vessels, which will lead to clinical symptoms and performance such as blurry eyes, blurred vision, rotating vision, and blurred vision. Second, if trigeminal neuralgia or facial neuritis occurs when you have a cold, you will sneeze when you have a cold, and then sneezing will also involve the facial nerve roots and you will have starry eyes. Third, during an acute cervical spondylosis attack, if the sneezing force is too strong, there will be a transient deficiency of blood supply to the basilar artery, and the clinical manifestation of blinding.