Atropine eye drops refers to atropine sulfate eye drops, generally not used up the next day can usually be used again, but if there is contamination, it is not recommended to continue to use. Atropine sulfate eye drops are mainly used for the treatment of iridocyclitis, iritis, before and after cataract surgery and pediatric dilated optometry, etc. After atropine sulfate eye drops are not used up, they can usually still be used the next day, but they need to be placed in a cool place to avoid contamination. If the solution is contaminated, it is not recommended to continue using it, which may lead to eye infections. Patients are advised to use atropine sulfate eye drops in accordance with medical advice and not to use it without authorization to avoid adverse reactions.