Although precise prevalence figures regarding amblyopia and strabismus are not easily obtained, most studies suggest that at least 5% of the population is affected by these disorders.1,2 In a large percentage of patients, they go undetected and untreated. A survey of 6768 youths 12 to 17 years old showed that more than 5% had strabismus, yet only 1.4% had ever received treatment.3 The need for early detection and treatment of these disorders has been emphasized by both clinicians and basic scientists interested in the plasticity of developing visual systems.4 Although some authorities have questioned the efficacy of preschool screening programs,5 a policy statement by the American Academy of Ophthalmology, Infant and Children's Eye Care, in part asserts that "The American Academy of Ophthalmology strongly endorses the concept of early screening and treatment of eye and visual problems of infants and children."
See also p 1528.
Hoyt CS. PhotorefractionA Technique for Preschool Visual Screening. Arch Ophthalmol. 1987;105(11):1497-1498. doi:10.1001/archopht.1987.01060110043027