After atropine drops for pupil dilation, corneal reshaping lenses are usually worn after 21 days, but each person’s specific situation is different and varies, so you should consult your doctor, who decides the timing on an individual basis. Atropine, which is often used for dilated optometry, is a long-acting ciliary muscle paralyzing agent that usually wears off after 21 days, and the pupil will return to its normal size and contractile function after the drug wears off. After the atropine drops have worn off, it is usually necessary to have a new eye exam after 21 days, after which you can wear keratoconus lenses for vision correction, the prescription of which will be determined by your doctor based on your dilated eye exam. Pupil dilation is used to paralyze the ciliary muscle and to make objective measurements in a relaxed state, resulting in a more accurate refractive error. Pupil dilation itself will not cause adverse effects on the patient, but temporary photophobia and blurred vision of near objects may occur after dilation, which can usually be relieved on its own. After the atropine drops, the patient should be rechecked at the time specified by the doctor before wearing the corneal reshaping lenses. The patient should pay attention to maintaining good eye habits and regular work and rest, which is conducive to the correction of visual acuity.