After thyroidectomy, if the patient’s eyes have blurred vision and other uncomfortable symptoms, it may be caused by a variety of reasons, such as central retinal artery embolism, metabolic cataract and so on. 1. Central retinal artery embolism: After thyroidectomy, patients may suffer from hypercoagulability due to postoperative stress, resulting in central retinal artery embolism, which may cause a sharp loss of vision in one eye, and need to go to the ophthalmology department of the hospital to be diagnosed by the doctor through fundoscopy and fundus fluorescence angiography. 2. Metabolic cataract: After thyroidectomy, metabolic cataract may be triggered by the change of hormone level in the body. If both eyes of the patient can develop successively, the patient may have vision loss in one eye at the early stage of the disease, which can be confirmed by the doctor’s slit lamp microscopic examination. After thyroidectomy, patients are advised to follow the doctor’s instructions, have regular checkups, and consult the doctor when discomfort occurs.