Horner’s syndrome is clinically common and can occur with involvement of any part of the sympathetic pathway. Common causes include inflammation, trauma, surgery, tumors, thrombosis, or aneurysms. The sympathetic nerve trunk is often compressed by aortic aneurysms in syphilitic heart disease. The appearance of this syndrome not only causes great harm to the patient’s body, but also seriously infringes on the patient’s psychological health. Therefore, early detection and treatment of Horner’s syndrome is necessary. The diagnosis of Horner’s syndrome is based on the following: (seen on the same side as sympathetic nerve damage) 1. pupillary constriction: due to paralysis of the pupillary opening muscle of the iris, but the response to light and convergence are present. 2. 2. ptosis: due to paralysis of the lid muscle, the eyelid fissure is slightly smaller due to ptosis, but the eyelid can still open and close on its own. 3. Entropion of the eyeball: associated with paralysis of the sphincter muscle behind the eyeball. 4.Low sweating on the ipsilateral side: It is due to glandular secretion disorder, dryness of the face, no sweating, fever and flushing. 5.Decreased intraocular pressure: related to the vascular neurological regulation, if this symptom is congenital or onset in children, it is often accompanied by iris heterochromia, other excessive tearing or reduced tearing, transient low intraocular pressure, occasionally cataract, early onset can be seen in the eyelid, conjunctiva, uvea and retinal blood vessels temporarily dilated.