Blurred vision caused by cerebral infarction can occur in four ways: First, infarction in the pontocerebral part of the midbrain affects the motor nerves or motor nerve nuclei that innervate the extraocular muscles, including the motoneurotic nerve and motoneurotic nucleus, the abducens nerve and abducens nucleus, and the talocrural nerve and talocrural nucleus, causing paralysis of the extraocular muscles, which affects the movement of the extraocular muscles, resulting in uncoordinated movement of both eyes and producing symptoms of diplopia, and the patient will Patients may feel blurred vision or blurred vision. Second, infarction of the internal capsule and lateral geniculate body can cause contralateral hemianopia, which can also cause symptoms of blurred vision. Third, infarction of the optic radiation area can cause visual field quadrant blindness, which can also cause symptoms of blurred vision. Fourth, bilateral or unilateral infarction of the visual cortex in the occipital region of the brain causes central visual field changes, and the patient develops hemianopia or quadrant blindness or total blindness, thus producing symptoms of blurred vision.