Whether the pupil dilation can be recovered should be analyzed on a case-by-case basis. Pupil dilation caused by minor eye trauma or the use of dilating drugs can usually be recovered, while pupil dilation caused by severe eye trauma is usually more difficult to recover. If the patient’s pupil dilation is caused by long-term improper eye use or minor trauma, it can be gradually recovered, and the patient can pay attention to rest and do a good job of eye care, and can usually recover on their own. Ophthalmologic examination or treatment requires the use of pupil dilators, such as compound tropicamide eye drops, can also cause the patient’s pupils to dilate, usually after the metabolism of the drug can be restored. If the patient has a more serious trauma, the pupil sphincter muscle fibers or iris pupil rim and other parts of the injury, resulting in pupil dilation, generally less likely to recover on their own. It is recommended that patients with significant pupil dilation seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.