Updated Recommendations for Vision Screening in Young Children

Overview of Amblyopia

The United States Preventive Services Task Force has published updated recommendations regarding vision screening for children under six years of age. Amblyopia, commonly referred to as lazy eye, can lead to various visual impairments and potential vision loss in both the affected eye and the non-amblyopic eye. This condition arises from dysfunction in the neural pathways responsible for vision, resulting in decreased visual sharpness. Beyond its direct impact on sight, amblyopia can adversely affect a child’s life, increasing the risk of accidents, bullying, depression, anxiety, and low self-esteem.

Risk Factors for Amblyopia

Children at greater risk for developing amblyopia include those with strabismus (crossed eyes), myopia (nearsightedness), hyperopia (farsightedness), astigmatism (blurred vision for near and far objects), and media opacity (like cataracts). Additional risk factors may include a family history of the disorder, premature birth, low birth weight, or maternal substance abuse during pregnancy. Strabismus is the leading cause of amblyopia in children under three, while both strabismus and significant differences in visual acuity between the eyes are prevalent in children aged three to six.

Recent Findings on Screening

In a recent report published in JAMA, the US Preventive Services Task Force reviewed various studies from the United States, Canada, Europe, New Zealand, and Australia. The task force found sufficient evidence to recommend vision screening for children aged six months to five years. They concluded that screening in areas with lower prevalence would not necessarily lead to increased false positives, which could result in unnecessary treatments. Furthermore, the task force confirmed the effectiveness of current vision screening tools, such as visual acuity and ocular alignment tests, noting moderate improvements in vision for three to five-year-olds treated for amblyopia or its risk factors.

Treatment Considerations

The task force emphasized the necessity of treating amblyopia, as the condition is unlikely to resolve without intervention. However, they did not find enough evidence to determine the appropriate frequency of screenings for children aged three to five or to assess the benefits and risks of treating amblyopia or its risk factors in children under three. Overall, they concluded that the benefits of treatment for amblyopia and its associated risk factors in children aged three to five outweigh potential risks.

Future Research Directions

The task force recommends further research to establish optimal screening intervals, evaluate the benefits and risks of treatments for children under three years old, and identify the most effective screening tests.

Reference

Grossman, D.C, Curry, S.J., Owens, D.K., Barry, M.J., Davidson, K.W., Doubeni, C.A.,…Chien-Wen Tseng, C. (2017). Vision Screening in Children Aged 6 Months to 5 Years US Preventive Services Task Force Recommendation Statement. JAMA, 318(9), 836-844. doi:10.1001/jama.2017.11260