How long can you do your homework after dilating your pupils varies according to the type of dilating medicine, if it is a fast dilating medicine, you can do your homework after about 6-10 hours, if it is a slow dilating medicine, you can do your homework after about 20 days. 1. Rapid dilating drugs: rapid dilating drugs have a rapid onset and short duration of action, such as compound tropicamide ophthalmic solution, the use of pupil dilation can return to normal after about 6-10 hours, you can do homework. 2. Slow pupil-dilating drugs: slow pupil-dilating drugs are mainly atropine, with longer efficacy, suitable for children under 13 years old, and can return to normal after about 20 days of use, and children can write homework normally. It is recommended that patients follow the doctor’s instructions after the dilated pupil care, specific how long after the homework can be done, need to consult the attending physician.