Atropine ophthalmic solution mainly has the effect of dilating the pupil, the active ingredient of this drug is atropine, atropine is a kind of M cholinergic receptor blocker, in the tissues of the eye can block M cholinergic receptor, so that the pupil is dilated, ciliary muscle paralysis. In the clinic, it can be mainly used for iridocyclitis, can also be used to check the fundus of the eye before the dilation of the pupil, but also can be used for optometry, prescription glasses, refractive index examination of the pupil dilation, mainly to play a role in dilating the pupil. This drug should be used reasonably under the guidance of a doctor.