The principles of prescription for children and adults are completely different, and the principles of prescription for children with myopia and amblyopia are also very special. The principles of children’s prescription at various hospitals in China are as follows: a. Children’s pupil dilatation principles: 1, children under 8 years old: all atropine pupil dilatation 2, children without combined strabismus, combined exotropia atropine pupil dilatation for three days. 3. Children with combined internal strabismus should have their pupils dilated with atropine for five days (to remove the adjustment factor). 4. Children with amblyopia, who are able to wear glasses regularly, will have their doctor decide whether they can use Midori pupil dilatation (adjustment relaxation) before changing glasses. 2. Children over 8 years old: 1. Children with complaints of poor visual acuity at first consultation, Midori or tropicamide pupil dilatation. 2. For children whose vision cannot be corrected after pupil dilatation, they should be referred to the amblyopia and strabismus clinic for consultation and treatment. 3. Children with combined amblyopia should have their pupils dilated with atropine. 4, after the optometry, if it is simple myopia, the optometry office can directly retest after the prescription of glasses. 5, optometry for some special prescription children can ask the doctor consultation prescription program (high myopia, high number of astigmatism, progressive myopia children). (1) Myopia is the minimum correction of the best vision, vision correction to 1.0 (2) Farsightedness minus the adjustment prescription, by the optometrist trial and according to the vision and symptoms prescription (farsightedness minus 1D adjustment) (3) For children who do not cooperate with the examination of myopia regular prescription, farsightedness and then minus 1D adjustment prescription. (2) Children with amblyopia (without strabismus) (1) Children under 6 years old, with adequate correction of hyperopia and astigmatism (low age children have strong visual adaptation ability). (2) Children between 6 and 9 years old, high hyperopia should be reduced appropriately, astigmatism should be corrected in sufficient amount, and the second prescription should be adequate for hyperopia. (3) Children over 9 years old, high hyperopia and high astigmatism should be given 2/3 of the first prescription, and the second prescription should be given in full (older children have poor adaptive ability) (4) Children with refractive error, and younger children can be given an extraordinary amount of glasses (more than 300 degrees in both eyes). Older children should be given glasses according to medical advice. If amblyopia combined with strabismus needs to be treated, glasses will be prescribed according to the principles of amblyopia prescription without considering the strabismus, and glasses will be prescribed according to the principles of strabismus and surgery after the amblyopia is cured. 4, children with strabismus prescription (not combined with amblyopia) (1) exotropia, exotropia combined with hyperopia, low correction prescription (hyperopia is large, can aggravate exotropia) combined with myopia, adequate correction (myopia can control exotropia) (2) internal strabismus, internal oblique combined with hyperopia, adequate correction (hyperopia can control internal strabismus) combined with myopia, appropriate low correction (the best vision, the lowest number of degrees) regulated internal strabismus In addition to the full correction of hyperopia, we should reduce the hyperopia according to the results of the synoptic examination when changing the lenses, and should reduce the hyperopia without increasing the strabismus.