Dilated pupils after a month is not good, you can consider to continue clinical observation, eye local drops to shrink the pupil medicine, surgery and other treatment methods. 1. Clinical observation. A small number of patients are too sensitive to pupil dilating drugs, therefore, it will lead to the pupil not fully recovered even after the normal pupil recovery time after topical pupil dilating drugs are applied to the eyes, you can consider continuing clinical observation, and most of the patients can recover on their own. 2. If the pupil dilation affects the patient’s daily life, you can use local drops to shrink the pupil. The medication includes Trichosanthine eye drops, etc., to promote the recovery of the pupil. 3. Due to trauma, inflammation and other causes of eye lesions, the use of dilated drugs during treatment, stop the drug still exists after the pupil dilation, mostly due to the pupil sphincter damage or iris adhesion and other reasons, rather than the role of the drug, if the impact on the life of the larger, you can consider surgical closure to restore. Specific treatment is recommended to patients timely medical treatment, as prescribed by the doctor.