The principles of prescription for children are completely different from those for adults because of their age and the presence of various congenital dysplasias that require treatment. The principles of prescription for children with myopia and amblyopia are very special, and if the child has a combination of “strabismus”, the principles of prescription are even more complicated. For children under 8 years old, all of them should use the slow and long-acting “atropine” drops to dilate their pupils. Children without strabismus and children with exotropia should have their pupils dilated with atropine for three days; children with internal strabismus should have their pupils dilated with atropine for five days (to eliminate the ciliary muscle adjustment factor as much as possible); children with amblyopia, who can wear glasses regularly, should have their pupils dilated with the fast-acting short-acting “Medrol” drops before changing their glasses (to relax the eye adjustment); children over 8 years old should have their pupils dilated with the fast-acting “Medrol” drops. Children over 8 years old: 1. If the child complains of poor vision at the first visit, use fast-acting “Medrol” or “Topamax” eye drops for pupil dilatation; 2. 3, the doctor diagnosed as amblyopic children, to use atropine dilated pupil optometry; 4, dilated pupil optometry, if only simple myopia, the optometrist can directly retest after prescription glasses; 5, the optometrist for some special diopter children (high myopia, large number of astigmatism, progressive myopia children), can ask the ophthalmologist consultation prescription program;.