A 4.9 condition in a child’s eyes is not necessarily myopic and needs to be judged in relation to the child’s age and refractive status. Generally speaking, the standard visual acuity varies at different ages and usually rises gradually as the child grows older. For younger children, an eye exam at 4.9 is not necessarily myopic. Simply checking the visual acuity chart and finding that the child’s visual acuity is 4.9 cannot directly confirm myopia. For myopia checking criteria, dilated optometry is needed to obtain a more accurate refraction and clarify whether the child is myopic. It is recommended to take your child to the ophthalmology department of a regular hospital and have a professional ophthalmologist conduct a pupil dilation and optometry examination on your child, then according to the examination results, determine whether your child is myopic or not, and if necessary, give targeted treatment and therapy.