9 years old, 100 degree myopia.

9-year-old children show 100 degrees of myopia belongs to mild myopia, need to take the child to the hospital ophthalmology for mydriasis optometry examination, determine whether true myopia or pseudomyopia. If mydriasis after optometry still maintained at 100 degrees, then, indicating that 100 degrees of myopia are true myopia. If the degree of refraction myopia decreases after mydriasis, then the degree obtained after mydriasis is the degree of true myopia, and the difference between the degree of myopia before and after mydriasis is the degree of pseudomyopia.