Children: Dilated optometry is an optometric procedure in which the ciliary muscle of the eye is completely paralyzed by the application of medication, causing it to lose its regulating effect. This is mainly because of the strong regulation of the eyes of adolescents, and if the pupil is not dilated during optometry, the regulatory myopia component, known as pseudomyopia, cannot be removed, and the accuracy of the results is affected. The method of dilated optometry: 1. Long-acting dilator: apply atropine eye ointment to the eye twice a day for 3 days, optometry on the fourth day, and try glasses 4 weeks later; 2. Short-acting dilator: use tropine amide eye drops to spot the eye once every 5 minutes for 5 times, optometry 20 minutes later, and try glasses the next day. Normal signs after pupil dilatation: difficulty seeing things (especially near things), photophobia (strong light). These are temporary, and it usually takes about 4 weeks for the symptoms to disappear with atropine, and about 8 hours with tropicamide. There is no residual discomfort from dilated pupils, much less any long-lasting effects on the eyes. Adults: 1. Therapeutic pupil dilatation: The main purpose of pupil dilatation for inflammation of the eye is to prevent post-iris adhesions and to relieve the spasm of the iris and ciliary body caused by inflammatory stimulation in order to reduce local inflammation. 2. Examination pupil dilatation: The pupil is dilated for detailed examination of undefined fundus pathology, refractive interstitial clouding, ocular trauma, etc.