Atropine is a ciliary muscle paralyzing agent that dilates the pupil. There are three main applications of this drug in ophthalmology: the first, pupil dilatation optometry, usually for children up to 6 years of age, uses atropine sulfate ophthalmic gel to dilate the pupil and then conduct an optometric examination, which provides an accurate picture of the refractive state of the child’s eye. The second, aseptic inflammatory treatment, such as uveitis, can reduce the inflammatory response in the eye and avoid iris adhesions by moving the pupil. Third, this drug can be used for the treatment of pseudomyopia, which is caused by unreasonable eye habits that result in the ciliary muscle being in an overly tense state. By using low-concentration atropine drops, the ciliary muscle can be relaxed and released from spasm to treat pseudomyopia and promote a return to normal vision.