There are various kinds of eye medicines for pupil dilation, and the common ones are compound tropicamide eye drops, atropine sulfate ophthalmic gel, and cyclopentolate hydrochloride eye drops. 1. Compound tropicamide eye drops: It is suitable for regulating paralysis and dilating pupils for therapeutic and diagnostic purposes. There may be allergy, conjunctivitis, increased intraocular pressure, thirst, nausea and other adverse reactions during the use of the drug, and those with systemic symptoms need to stop the drug. Do not drive dangerously while using the drug. Patients with glaucoma and those who are allergic to this drug are not allowed to use this drug. 2. Atropine Sulfate Ophthalmic Gel: It is suitable for iridocyclitis, astigmatism before funduscopic examination, and pupil dilation before refractive index examination of optometry. Adverse reactions such as dry skin and mucous membranes, fever, facial flushing and tachycardia may occur after use. Prostatic hypertrophy, glaucoma patients, allergy to this drug is prohibited; pregnant women should not use. 3. Cyclopentolate Hydrochloride Eye Drops: For pupil dilation and ciliary muscle paralysis. This drug may cause eye burning, difficulty in seeing, photophobia, conjunctival congestion, tachycardia or bradycardia, vasodilation and other adverse reactions. It is contraindicated in people with closed-angle glaucoma or narrow angle, and in people who are allergic to this drug. The drug is used with caution in patients with Alzheimer’s disease and prostate hypertrophy. All of the above drugs should be used under the guidance of a professional doctor, individuals should not use drugs indiscriminately to avoid injury to the eyes.