Rapid pupil dilation can restore the pupil to normal size in 6-8 hours. Rapid pupil dilation is commonly used clinically for dilated optometry in adolescents aged 10-18 years, as well as for examination of the posterior segment of the eye and treatment of ocular inflammatory diseases such as uveitis and keratitis. A commonly used rapid pupil dilator is compounded tropicamide eye drops. After applying tropicamide eye drops, it is important to press on the tear sac for 2-3 minutes to avoid adverse reactions caused by the absorption of the drops. In addition, looking at near places, such as cell phones or books, can be blurred after using pupil-diluting drops, so do not look at them during pupil-dilution. In addition, you will be afraid of light and cannot open your eyes in bright light, so it is recommended that you wear sunglasses when you go out. The pupils will naturally return to their normal size after the effect time of the dilating medicine and will not leave any symptoms.