Medical News Today -- One in 10 infants in the U.S. have undetected vision problems, ranging from crossed eyes to cancer. While most parents know eye and vision problems can be detected in children before they’re a year old, only 19 percent of those who participated in the American Optometric Association’s (AOA) annual Eye-Q® survey report taking their infant for a comprehensive eye assessment. Thirty-three percent of parents wait until their child is between one and two years of age, while 26 percent wait until their child is five years of age or older.