When I see this title, I think most readers can come up with the correct answer. However, it is a bit difficult to distinguish the difference between the three. The term “myopia” is the most familiar to us. Simply put, myopia means seeing things clearly up close and blurring things at a distance. It is professionally defined as “a distant object refracted by the eye and focused in front of the retina, which from time to time forms a clear image on the retina”. So, can “farsightedness” also be inferred to mean clear vision of distant objects and blurred vision of near objects? Actually, no. Farsightedness means that distant objects are refracted by the eye and focused on the retina, forming a blurred virtual image on the retina. Therefore, people with hyperopia do not see clearly at far and near. In school physical examinations and outpatient clinics, we often find many children with poor vision, which parents and teachers often attribute to myopia and logically blame on watching TV and playing video games. In fact, the causes of poor vision in children are complex. Most preschoolers have a poor history because of farsightedness, not myopia. Newborns often have 200-300 degrees of hyperopia due to the small length of their eyes. Later, as the length of the eye gradually increases with age, the degree of hyperopia decreases and slowly turns to orthopia. However, there are individual differences in the development of the eye. Some children have 1.0 vision at the age of 3-4, while others still have less than normal vision when they go to elementary school. For children between the ages of 4 and 6, once vision is found to be between 0.6 and 0.8, or even 0.5, and 100-200 degrees of hyperopia is present on the dilated eye exam, parents and teachers should not worry, and if the child has no significant discomfort, there is no need to wear glasses. However, if the child has amblyopia or internal strabismus, he or she should have the pupil dilated and wear glasses in time to avoid aggravation of the condition. Parents often ask: “Our child has farsightedness (or myopia) and amblyopia, what should we do?” Some parents even confuse farsightedness, myopia and amblyopia. Thus, it is not surprising that the number of so-called “amblyopic children” has been on the rise in recent years. In fact, amblyopia is a condition in which no eye abnormality is found after examination by a specialist, and the visual acuity does not reach 0.9 after accurate optometry and glasses. Many children with farsightedness, myopia or astigmatism have poor vision in their naked eyes, but their vision can be corrected after wearing glasses, which cannot be called amblyopia. Of course, there are some children who cannot improve their vision after wearing glasses or whose vision does not improve significantly, excluding the factor of optometric error, then there is a possibility of amblyopia, especially in some children with strabismus or nystagmus. In this case, in addition to the treatment of the child with glasses, it is more important that parents should supervise the necessary amblyopia training for the child under the guidance of the doctor.