Side effects of atropine eye drops, mainly the pupil dilation state on the vision as well as local redness, fever, etc., usually disappear in 2~3 weeks. Atropine and tropicamide are often used to dilate the pupils of children and adolescents before they undergo optometry funduscopic examinations, etc., in order to avoid the influence of adjustment on the results or to facilitate the observation of the fundus. As atropine itself is a cholinergic receptor antagonist, it can cause side effects such as localized redness and warmth, which disappear in 2-3 weeks at most. Atropine eye drops belong to the more potent pupil dilating drugs, the state of pupil dilatation will lead to blurred vision and photophobia when reading, etc., and the recovery of the state of pupil dilatation may take 1~2 weeks.