@inbook{1182925965, author={Helen H. Yeung and David S. Walton}, editor={Kline, Mark W.}, title={Visual Impairment in Childhood}, booktitle={Rudolph's Pediatrics, 23e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2018}, url={accesspediatrics.mhmedical.com/content.aspx?aid=1182925965} }