Nowadays, hyperthyroidism has become a very common key disease, which can cause great damage to the patient’s body, especially the two conditions that everyone is impressed with, the big neck and exophthalmos, which also cause great damage to the patient’s appearance. So, many patients are asking a question, ‘How are the four measurement ranges of hyperthyroidism classified?’ Below, we will give you an answer to this issue.

Firstly, we should explain that the exophthalmos of hyperthyroidism is classified according to the degree of myopia. How is it? Let’s take a look together.

First, there is often overlap between degrees 1 and 2 in clinical medicine. The most atypical is the atrophy of the upper eyelid muscle, in addition to gaze, slight upper eyelid, and periorbital edema. At present, there is upper eyelid lag when looking, but this is not unique to thyroid eye disease and can also be seen in other diseases.

Second, the number of exophthalmos is 3, and the exophthalmos number is not less than 22mm (for foreigners). This condition rarely exists independently and often involves soft tissue. The precise measurement of the same patient at different times can have a 2mm change. In the case of excluding other causes, if the patient only has exophthalmos exceeding 22mm without involvement of soft tissue, it should also be counted as 3 degrees.

Third, the 4th degree involves the involvement of extraocular muscles, which often manifests as restrictive myopathy, most commonly affecting the inferior and medial recti muscles, which can often be seen in patients’ vertical and lateral gaze. Some people find that eye symptoms are more severe in the morning.

Fourth, the 5th degree involves the cornea, which may have exposure keratitis, corneal opacity, and ulcers. Finally, the 6th degree involves visual impairment. About 5% of patients with thyroid eye disease have ocular neuropathy. About 80% of these patients have abnormalities in extraocular muscle function, while the exophthalmos is not very prominent, and the history of present illness is hidden vision and visual field impairment.

This is the detailed introduction of how exophthalmos is classified and the classification status of exophthalmos, hoping everyone can have a clear understanding and grasp of these aspects. Hyperthyroidism can cause great harm to the periorbital area, so it is hoped that patients can also pay more attention to prevention in these aspects.