According to the U.S. “New York Daily News” recently reported that the survey shows that one in 20 preschoolers and one in four school-age children have eye diseases, of which the prevalence of childhood strabismus and amblyopia are 1/25 and 1/30 respectively. American ophthalmologist Bruce Moore said that some amblyopia symptoms are obvious and some are not, and sometimes parents do not detect them in time. Therefore, he recommends that between the ages of 3 and 3 1/2 years, take your child for a comprehensive eye exam to rule out amblyopia and strabismus as a potential problem. In addition, myopia, a problem that plagues most children, can be detected in time by some small signs. Parents should pay attention if their child is often serial when reading and needs to hold his or her finger in the book; if his or her eyes are too close to the book, missing words or confusing small words; or if he or she often feels a headache. Special attention should also be paid to taking the child for an eye exam if the child was born prematurely or if the parents wear glasses before age 10. The American Academy of Ophthalmology recommends that children have an annual eye exam after they start school.