(1) Adolescents and children under the age of 18, especially those who are having their first optometry (2) Patients with hyperopia, especially those who have not worn glasses before or those who have been working at close range for a long time (3) Patients with high refractive error who are also very insensitive to primary optometry (4) Patients who work at close range for a long time, resulting in excessive adjustment or even spasm. 2.Why do you need a dilated eye exam? The eye medication used for dilated eye exams is called a ciliary muscle paralyzing agent. Because the eyes of children and adolescents are more adjustable, and people who work at close range for long periods of time are always in a state of adjustment tension, if the direct optometry will take into account the false degrees produced by the state of adjustment, so dilated optometry is required to obtain the true refractive error. 3, there is no harm in dilated pupils The purpose of dilated pupils is to relieve eye fatigue and relax the muscles that are tense and regulated, so that the refractive error can be more accurate. Dilated pupils themselves do not cause adverse effects on patients. However, there may be temporary photophobia and blurring of near objects after the pupils are dilated (seeing far away has no effect and you can still live normally), but you should be careful to wear polarized sunglasses to shield your eyes from strong light and reduce the intake of ultraviolet light. 4. Method of pupil dilatation and the efficacy of the medication Depending on the age of the child, ciliary muscle paralyzing agents of different durations are used. (1) In general, children under 6 years of age and those with hyperopia use a long-acting ciliary muscle paralyzing agent, i.e., 1% atropine, which is commonly used clinically. The eyes are examined twice daily, once in the morning and once in the evening, for 3 days, and on the 4th day, approximately 3 —-4 weeks after stopping the drug. (2) 6 —–12 years old, use medium-acting pupil dilator i.e. cyclopentolate hydrochloride eye drops (also called cyclopentone, Safije). Dot both eyes, every 5 minutes, for a total of 3 times, one drop each time, and press the inner corner of the eye with a finger after dotting, and examine the eyes 45 minutes later with an optometrist. The effect lasts for 2 —-3 days and varies slightly according to individual differences. (3) Above 12 years old, use short-acting pupil dilator, i.e. compound tropicamide eye drops (also called Medrol). Dot both eyes, every 5 minutes, 3 times, one drop each time, press the inner corner of the eye with your finger after dotting, and optometry 30 minutes later. The effect lasts for 6 —-8 hours and varies slightly according to individual differences. 5. Precautions for pupil dilatation (1) Pupil dilatation must be performed under the direction of a physician (2) Pupil dilatant should only be used by patients who need it and should not be given to others. (3) Take care to protect your pupils from light after dilating, and wear a sun hat or polarized glasses when you go out. (4) Blurred vision and photophobia may occur after pupil dilatation and will disappear on their own after the effect of the medication has worn off. (5) If you use atropine to dilate your pupils at home, you should always observe the pupils and contact medical personnel or go to the hospital if you have symptoms such as vomiting, irritability, or delirium.