The most common causes of vision problems in children are amblyopia (a neurodevelopmental disorder that arises from abnormal processing of visual images that leads to a functional reduction of visual acuity) and its associated risk factors (Table 1), nonamblyopic strabismus and nonamblyopic refractive error.
9- 12 Recent prevalence estimates of amblyopia, strabismus, and anisometropia (a difference in refractive power between the eyes, in which one foveal image is more blurred than the other) among US children younger than 6 years range from 1% to 6%.
12- 16